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cpython/Lib/test/test_ast.py

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import ast
import builtins
import dis
import os
import sys
import types
import unittest
import warnings
import weakref
from textwrap import dedent
from test import support
def to_tuple(t):
if t is None or isinstance(t, (str, int, complex)):
return t
elif isinstance(t, list):
return [to_tuple(e) for e in t]
result = [t.__class__.__name__]
if hasattr(t, 'lineno') and hasattr(t, 'col_offset'):
result.append((t.lineno, t.col_offset))
if hasattr(t, 'end_lineno') and hasattr(t, 'end_col_offset'):
result[-1] += (t.end_lineno, t.end_col_offset)
if t._fields is None:
return tuple(result)
for f in t._fields:
result.append(to_tuple(getattr(t, f)))
return tuple(result)
# These tests are compiled through "exec"
# There should be at least one test per statement
exec_tests = [
# None
"None",
# Module docstring
"'module docstring'",
# FunctionDef
"def f(): pass",
# FunctionDef with docstring
"def f(): 'function docstring'",
# FunctionDef with arg
"def f(a): pass",
# FunctionDef with arg and default value
"def f(a=0): pass",
# FunctionDef with varargs
"def f(*args): pass",
# FunctionDef with kwargs
"def f(**kwargs): pass",
# FunctionDef with all kind of args and docstring
"def f(a, b=1, c=None, d=[], e={}, *args, f=42, **kwargs): 'doc for f()'",
# ClassDef
"class C:pass",
# ClassDef with docstring
"class C: 'docstring for class C'",
# ClassDef, new style class
"class C(object): pass",
# Return
"def f():return 1",
# Delete
"del v",
# Assign
"v = 1",
"a,b = c",
"(a,b) = c",
"[a,b] = c",
# AugAssign
"v += 1",
# For
"for v in v:pass",
# While
"while v:pass",
# If
"if v:pass",
# If-Elif
"if a:\n pass\nelif b:\n pass",
# If-Elif-Else
"if a:\n pass\nelif b:\n pass\nelse:\n pass",
# With
"with x as y: pass",
"with x as y, z as q: pass",
# Raise
"raise Exception('string')",
# TryExcept
"try:\n pass\nexcept Exception:\n pass",
# TryFinally
"try:\n pass\nfinally:\n pass",
# Assert
"assert v",
# Import
"import sys",
# ImportFrom
"from sys import v",
# Global
"global v",
# Expr
"1",
# Pass,
"pass",
# Break
"for v in v:break",
# Continue
"for v in v:continue",
# for statements with naked tuples (see http://bugs.python.org/issue6704)
"for a,b in c: pass",
"for (a,b) in c: pass",
"for [a,b] in c: pass",
# Multiline generator expression (test for .lineno & .col_offset)
"""(
(
Aa
,
Bb
)
for
Aa
,
Bb in Cc
)""",
# dictcomp
"{a : b for w in x for m in p if g}",
# dictcomp with naked tuple
"{a : b for v,w in x}",
# setcomp
"{r for l in x if g}",
# setcomp with naked tuple
"{r for l,m in x}",
# AsyncFunctionDef
"async def f():\n 'async function'\n await something()",
# AsyncFor
"async def f():\n async for e in i: 1\n else: 2",
# AsyncWith
"async def f():\n async with a as b: 1",
# PEP 448: Additional Unpacking Generalizations
"{**{1:2}, 2:3}",
"{*{1, 2}, 3}",
# Asynchronous comprehensions
"async def f():\n [i async for b in c]",
# Decorated FunctionDef
"@deco1\n@deco2()\n@deco3(1)\ndef f(): pass",
# Decorated AsyncFunctionDef
"@deco1\n@deco2()\n@deco3(1)\nasync def f(): pass",
# Decorated ClassDef
"@deco1\n@deco2()\n@deco3(1)\nclass C: pass",
# Decorator with generator argument
"@deco(a for a in b)\ndef f(): pass",
# Decorator with attribute
"@a.b.c\ndef f(): pass",
# Simple assignment expression
"(a := 1)",
# Positional-only arguments
"def f(a, /,): pass",
"def f(a, /, c, d, e): pass",
"def f(a, /, c, *, d, e): pass",
"def f(a, /, c, *, d, e, **kwargs): pass",
# Positional-only arguments with defaults
"def f(a=1, /,): pass",
"def f(a=1, /, b=2, c=4): pass",
"def f(a=1, /, b=2, *, c=4): pass",
"def f(a=1, /, b=2, *, c): pass",
"def f(a=1, /, b=2, *, c=4, **kwargs): pass",
"def f(a=1, /, b=2, *, c, **kwargs): pass",
]
# These are compiled through "single"
# because of overlap with "eval", it just tests what
# can't be tested with "eval"
single_tests = [
"1+2"
]
# These are compiled through "eval"
# It should test all expressions
eval_tests = [
# None
"None",
# BoolOp
"a and b",
# BinOp
"a + b",
# UnaryOp
"not v",
# Lambda
"lambda:None",
# Dict
"{ 1:2 }",
# Empty dict
"{}",
# Set
"{None,}",
# Multiline dict (test for .lineno & .col_offset)
"""{
1
:
2
}""",
# ListComp
"[a for b in c if d]",
# GeneratorExp
"(a for b in c if d)",
# Comprehensions with multiple for targets
"[(a,b) for a,b in c]",
"[(a,b) for (a,b) in c]",
"[(a,b) for [a,b] in c]",
"{(a,b) for a,b in c}",
"{(a,b) for (a,b) in c}",
"{(a,b) for [a,b] in c}",
"((a,b) for a,b in c)",
"((a,b) for (a,b) in c)",
"((a,b) for [a,b] in c)",
# Yield - yield expressions can't work outside a function
#
# Compare
"1 < 2 < 3",
# Call
"f(1,2,c=3,*d,**e)",
# Call with multi-character starred
"f(*[0, 1])",
# Call with a generator argument
"f(a for a in b)",
# Num
"10",
# Str
"'string'",
# Attribute
"a.b",
# Subscript
"a[b:c]",
# Name
"v",
# List
"[1,2,3]",
# Empty list
"[]",
# Tuple
"1,2,3",
# Tuple
"(1,2,3)",
# Empty tuple
"()",
# Combination
"a.b.c.d(a.b[1:2])",
]
# TODO: expr_context, slice, boolop, operator, unaryop, cmpop, comprehension
# excepthandler, arguments, keywords, alias
class AST_Tests(unittest.TestCase):
def _is_ast_node(self, name, node):
if not isinstance(node, type):
return False
if "ast" not in node.__module__:
return False
return name != 'AST' and name[0].isupper()
def _assertTrueorder(self, ast_node, parent_pos):
if not isinstance(ast_node, ast.AST) or ast_node._fields is None:
return
if isinstance(ast_node, (ast.expr, ast.stmt, ast.excepthandler)):
node_pos = (ast_node.lineno, ast_node.col_offset)
self.assertGreaterEqual(node_pos, parent_pos)
parent_pos = (ast_node.lineno, ast_node.col_offset)
for name in ast_node._fields:
value = getattr(ast_node, name)
if isinstance(value, list):
first_pos = parent_pos
if value and name == 'decorator_list':
first_pos = (value[0].lineno, value[0].col_offset)
for child in value:
self._assertTrueorder(child, first_pos)
elif value is not None:
self._assertTrueorder(value, parent_pos)
self.assertEqual(ast_node._fields, ast_node.__match_args__)
def test_AST_objects(self):
x = ast.AST()
self.assertEqual(x._fields, ())
x.foobar = 42
self.assertEqual(x.foobar, 42)
self.assertEqual(x.__dict__["foobar"], 42)
with self.assertRaises(AttributeError):
x.vararg
with self.assertRaises(TypeError):
# "ast.AST constructor takes 0 positional arguments"
ast.AST(2)
def test_AST_garbage_collection(self):
class X:
pass
a = ast.AST()
a.x = X()
a.x.a = a
ref = weakref.ref(a.x)
del a
support.gc_collect()
self.assertIsNone(ref())
def test_snippets(self):
for input, output, kind in ((exec_tests, exec_results, "exec"),
(single_tests, single_results, "single"),
(eval_tests, eval_results, "eval")):
for i, o in zip(input, output):
with self.subTest(action="parsing", input=i):
ast_tree = compile(i, "?", kind, ast.PyCF_ONLY_AST)
self.assertEqual(to_tuple(ast_tree), o)
self._assertTrueorder(ast_tree, (0, 0))
with self.subTest(action="compiling", input=i, kind=kind):
compile(ast_tree, "?", kind)
def test_ast_validation(self):
# compile() is the only function that calls PyAST_Validate
snippets_to_validate = exec_tests + single_tests + eval_tests
for snippet in snippets_to_validate:
tree = ast.parse(snippet)
compile(tree, '<string>', 'exec')
def test_slice(self):
slc = ast.parse("x[::]").body[0].value.slice
self.assertIsNone(slc.upper)
self.assertIsNone(slc.lower)
self.assertIsNone(slc.step)
def test_from_import(self):
im = ast.parse("from . import y").body[0]
self.assertIsNone(im.module)
def test_non_interned_future_from_ast(self):
mod = ast.parse("from __future__ import division")
self.assertIsInstance(mod.body[0], ast.ImportFrom)
mod.body[0].module = " __future__ ".strip()
compile(mod, "<test>", "exec")
def test_alias(self):
im = ast.parse("from bar import y").body[0]
self.assertEqual(len(im.names), 1)
alias = im.names[0]
self.assertEqual(alias.name, 'y')
self.assertIsNone(alias.asname)
self.assertEqual(alias.lineno, 1)
self.assertEqual(alias.end_lineno, 1)
self.assertEqual(alias.col_offset, 16)
self.assertEqual(alias.end_col_offset, 17)
im = ast.parse("from bar import *").body[0]
alias = im.names[0]
self.assertEqual(alias.name, '*')
self.assertIsNone(alias.asname)
self.assertEqual(alias.lineno, 1)
self.assertEqual(alias.end_lineno, 1)
self.assertEqual(alias.col_offset, 16)
self.assertEqual(alias.end_col_offset, 17)
def test_base_classes(self):
self.assertTrue(issubclass(ast.For, ast.stmt))
self.assertTrue(issubclass(ast.Name, ast.expr))
self.assertTrue(issubclass(ast.stmt, ast.AST))
self.assertTrue(issubclass(ast.expr, ast.AST))
self.assertTrue(issubclass(ast.comprehension, ast.AST))
self.assertTrue(issubclass(ast.Gt, ast.AST))
def test_field_attr_existence(self):
for name, item in ast.__dict__.items():
if self._is_ast_node(name, item):
if name == 'Index':
# Index(value) just returns value now.
# The argument is required.
continue
x = item()
if isinstance(x, ast.AST):
self.assertEqual(type(x._fields), tuple)
def test_arguments(self):
x = ast.arguments()
self.assertEqual(x._fields, ('posonlyargs', 'args', 'vararg', 'kwonlyargs',
'kw_defaults', 'kwarg', 'defaults'))
with self.assertRaises(AttributeError):
x.args
self.assertIsNone(x.vararg)
x = ast.arguments(*range(1, 8))
self.assertEqual(x.args, 2)
self.assertEqual(x.vararg, 3)
def test_field_attr_writable(self):
x = ast.Num()
# We can assign to _fields
x._fields = 666
self.assertEqual(x._fields, 666)
def test_classattrs(self):
x = ast.Num()
self.assertEqual(x._fields, ('value', 'kind'))
with self.assertRaises(AttributeError):
x.value
with self.assertRaises(AttributeError):
x.n
x = ast.Num(42)
self.assertEqual(x.value, 42)
self.assertEqual(x.n, 42)
with self.assertRaises(AttributeError):
x.lineno
with self.assertRaises(AttributeError):
x.foobar
x = ast.Num(lineno=2)
self.assertEqual(x.lineno, 2)
x = ast.Num(42, lineno=0)
self.assertEqual(x.lineno, 0)
self.assertEqual(x._fields, ('value', 'kind'))
self.assertEqual(x.value, 42)
self.assertEqual(x.n, 42)
self.assertRaises(TypeError, ast.Num, 1, None, 2)
self.assertRaises(TypeError, ast.Num, 1, None, 2, lineno=0)
# Arbitrary keyword arguments are supported
self.assertEqual(ast.Constant(1, foo='bar').foo, 'bar')
self.assertEqual(ast.Num(1, foo='bar').foo, 'bar')
with self.assertRaisesRegex(TypeError, "Num got multiple values for argument 'n'"):
ast.Num(1, n=2)
with self.assertRaisesRegex(TypeError, "Constant got multiple values for argument 'value'"):
ast.Constant(1, value=2)
self.assertEqual(ast.Num(42).n, 42)
self.assertEqual(ast.Num(4.25).n, 4.25)
self.assertEqual(ast.Num(4.25j).n, 4.25j)
self.assertEqual(ast.Str('42').s, '42')
self.assertEqual(ast.Bytes(b'42').s, b'42')
self.assertIs(ast.NameConstant(True).value, True)
self.assertIs(ast.NameConstant(False).value, False)
self.assertIs(ast.NameConstant(None).value, None)
self.assertEqual(ast.Constant(42).value, 42)
self.assertEqual(ast.Constant(4.25).value, 4.25)
self.assertEqual(ast.Constant(4.25j).value, 4.25j)
self.assertEqual(ast.Constant('42').value, '42')
self.assertEqual(ast.Constant(b'42').value, b'42')
self.assertIs(ast.Constant(True).value, True)
self.assertIs(ast.Constant(False).value, False)
self.assertIs(ast.Constant(None).value, None)
self.assertIs(ast.Constant(...).value, ...)
def test_realtype(self):
self.assertEqual(type(ast.Num(42)), ast.Constant)
self.assertEqual(type(ast.Num(4.25)), ast.Constant)
self.assertEqual(type(ast.Num(4.25j)), ast.Constant)
self.assertEqual(type(ast.Str('42')), ast.Constant)
self.assertEqual(type(ast.Bytes(b'42')), ast.Constant)
self.assertEqual(type(ast.NameConstant(True)), ast.Constant)
self.assertEqual(type(ast.NameConstant(False)), ast.Constant)
self.assertEqual(type(ast.NameConstant(None)), ast.Constant)
self.assertEqual(type(ast.Ellipsis()), ast.Constant)
def test_isinstance(self):
self.assertTrue(isinstance(ast.Num(42), ast.Num))
self.assertTrue(isinstance(ast.Num(4.2), ast.Num))
self.assertTrue(isinstance(ast.Num(4.2j), ast.Num))
self.assertTrue(isinstance(ast.Str('42'), ast.Str))
self.assertTrue(isinstance(ast.Bytes(b'42'), ast.Bytes))
self.assertTrue(isinstance(ast.NameConstant(True), ast.NameConstant))
self.assertTrue(isinstance(ast.NameConstant(False), ast.NameConstant))
self.assertTrue(isinstance(ast.NameConstant(None), ast.NameConstant))
self.assertTrue(isinstance(ast.Ellipsis(), ast.Ellipsis))
self.assertTrue(isinstance(ast.Constant(42), ast.Num))
self.assertTrue(isinstance(ast.Constant(4.2), ast.Num))
self.assertTrue(isinstance(ast.Constant(4.2j), ast.Num))
self.assertTrue(isinstance(ast.Constant('42'), ast.Str))
self.assertTrue(isinstance(ast.Constant(b'42'), ast.Bytes))
self.assertTrue(isinstance(ast.Constant(True), ast.NameConstant))
self.assertTrue(isinstance(ast.Constant(False), ast.NameConstant))
self.assertTrue(isinstance(ast.Constant(None), ast.NameConstant))
self.assertTrue(isinstance(ast.Constant(...), ast.Ellipsis))
self.assertFalse(isinstance(ast.Str('42'), ast.Num))
self.assertFalse(isinstance(ast.Num(42), ast.Str))
self.assertFalse(isinstance(ast.Str('42'), ast.Bytes))
self.assertFalse(isinstance(ast.Num(42), ast.NameConstant))
self.assertFalse(isinstance(ast.Num(42), ast.Ellipsis))
self.assertFalse(isinstance(ast.NameConstant(True), ast.Num))
self.assertFalse(isinstance(ast.NameConstant(False), ast.Num))
self.assertFalse(isinstance(ast.Constant('42'), ast.Num))
self.assertFalse(isinstance(ast.Constant(42), ast.Str))
self.assertFalse(isinstance(ast.Constant('42'), ast.Bytes))
self.assertFalse(isinstance(ast.Constant(42), ast.NameConstant))
self.assertFalse(isinstance(ast.Constant(42), ast.Ellipsis))
self.assertFalse(isinstance(ast.Constant(True), ast.Num))
self.assertFalse(isinstance(ast.Constant(False), ast.Num))
self.assertFalse(isinstance(ast.Constant(), ast.Num))
self.assertFalse(isinstance(ast.Constant(), ast.Str))
self.assertFalse(isinstance(ast.Constant(), ast.Bytes))
self.assertFalse(isinstance(ast.Constant(), ast.NameConstant))
self.assertFalse(isinstance(ast.Constant(), ast.Ellipsis))
class S(str): pass
self.assertTrue(isinstance(ast.Constant(S('42')), ast.Str))
self.assertFalse(isinstance(ast.Constant(S('42')), ast.Num))
def test_subclasses(self):
class N(ast.Num):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.z = 'spam'
class N2(ast.Num):
pass
n = N(42)
self.assertEqual(n.n, 42)
self.assertEqual(n.z, 'spam')
self.assertEqual(type(n), N)
self.assertTrue(isinstance(n, N))
self.assertTrue(isinstance(n, ast.Num))
self.assertFalse(isinstance(n, N2))
self.assertFalse(isinstance(ast.Num(42), N))
n = N(n=42)
self.assertEqual(n.n, 42)
self.assertEqual(type(n), N)
def test_module(self):
body = [ast.Num(42)]
x = ast.Module(body, [])
self.assertEqual(x.body, body)
def test_nodeclasses(self):
# Zero arguments constructor explicitly allowed
x = ast.BinOp()
self.assertEqual(x._fields, ('left', 'op', 'right'))
# Random attribute allowed too
x.foobarbaz = 5
self.assertEqual(x.foobarbaz, 5)
n1 = ast.Num(1)
n3 = ast.Num(3)
addop = ast.Add()
x = ast.BinOp(n1, addop, n3)
self.assertEqual(x.left, n1)
self.assertEqual(x.op, addop)
self.assertEqual(x.right, n3)
x = ast.BinOp(1, 2, 3)
self.assertEqual(x.left, 1)
self.assertEqual(x.op, 2)
self.assertEqual(x.right, 3)
x = ast.BinOp(1, 2, 3, lineno=0)
self.assertEqual(x.left, 1)
self.assertEqual(x.op, 2)
self.assertEqual(x.right, 3)
self.assertEqual(x.lineno, 0)
# node raises exception when given too many arguments
self.assertRaises(TypeError, ast.BinOp, 1, 2, 3, 4)
# node raises exception when given too many arguments
self.assertRaises(TypeError, ast.BinOp, 1, 2, 3, 4, lineno=0)
# can set attributes through kwargs too
x = ast.BinOp(left=1, op=2, right=3, lineno=0)
self.assertEqual(x.left, 1)
self.assertEqual(x.op, 2)
self.assertEqual(x.right, 3)
self.assertEqual(x.lineno, 0)
# Random kwargs also allowed
x = ast.BinOp(1, 2, 3, foobarbaz=42)
self.assertEqual(x.foobarbaz, 42)
def test_no_fields(self):
# this used to fail because Sub._fields was None
x = ast.Sub()
self.assertEqual(x._fields, ())
def test_pickling(self):
import pickle
mods = [pickle]
try:
import cPickle
mods.append(cPickle)
except ImportError:
pass
protocols = [0, 1, 2]
for mod in mods:
for protocol in protocols:
for ast in (compile(i, "?", "exec", 0x400) for i in exec_tests):
ast2 = mod.loads(mod.dumps(ast, protocol))
self.assertEqual(to_tuple(ast2), to_tuple(ast))
def test_invalid_sum(self):
pos = dict(lineno=2, col_offset=3)
m = ast.Module([ast.Expr(ast.expr(**pos), **pos)], [])
with self.assertRaises(TypeError) as cm:
compile(m, "<test>", "exec")
self.assertIn("but got <ast.expr", str(cm.exception))
def test_invalid_identifier(self):
m = ast.Module([ast.Expr(ast.Name(42, ast.Load()))], [])
ast.fix_missing_locations(m)
with self.assertRaises(TypeError) as cm:
compile(m, "<test>", "exec")
self.assertIn("identifier must be of type str", str(cm.exception))
def test_invalid_constant(self):
for invalid_constant in int, (1, 2, int), frozenset((1, 2, int)):
e = ast.Expression(body=ast.Constant(invalid_constant))
ast.fix_missing_locations(e)
with self.assertRaisesRegex(
TypeError, "invalid type in Constant: type"
):
compile(e, "<test>", "eval")
def test_empty_yield_from(self):
# Issue 16546: yield from value is not optional.
empty_yield_from = ast.parse("def f():\n yield from g()")
empty_yield_from.body[0].body[0].value.value = None
with self.assertRaises(ValueError) as cm:
compile(empty_yield_from, "<test>", "exec")
self.assertIn("field 'value' is required", str(cm.exception))
@support.cpython_only
def test_issue31592(self):
# There shouldn't be an assertion failure in case of a bad
# unicodedata.normalize().
import unicodedata
def bad_normalize(*args):
return None
with support.swap_attr(unicodedata, 'normalize', bad_normalize):
self.assertRaises(TypeError, ast.parse, '\u03D5')
def test_issue18374_binop_col_offset(self):
tree = ast.parse('4+5+6+7')
parent_binop = tree.body[0].value
child_binop = parent_binop.left
grandchild_binop = child_binop.left
self.assertEqual(parent_binop.col_offset, 0)
self.assertEqual(parent_binop.end_col_offset, 7)
self.assertEqual(child_binop.col_offset, 0)
self.assertEqual(child_binop.end_col_offset, 5)
self.assertEqual(grandchild_binop.col_offset, 0)
self.assertEqual(grandchild_binop.end_col_offset, 3)
tree = ast.parse('4+5-\\\n 6-7')
parent_binop = tree.body[0].value
child_binop = parent_binop.left
grandchild_binop = child_binop.left
self.assertEqual(parent_binop.col_offset, 0)
self.assertEqual(parent_binop.lineno, 1)
self.assertEqual(parent_binop.end_col_offset, 4)
self.assertEqual(parent_binop.end_lineno, 2)
self.assertEqual(child_binop.col_offset, 0)
self.assertEqual(child_binop.lineno, 1)
self.assertEqual(child_binop.end_col_offset, 2)
self.assertEqual(child_binop.end_lineno, 2)
self.assertEqual(grandchild_binop.col_offset, 0)
self.assertEqual(grandchild_binop.lineno, 1)
self.assertEqual(grandchild_binop.end_col_offset, 3)
self.assertEqual(grandchild_binop.end_lineno, 1)
def test_issue39579_dotted_name_end_col_offset(self):
tree = ast.parse('@a.b.c\ndef f(): pass')
attr_b = tree.body[0].decorator_list[0].value
self.assertEqual(attr_b.end_col_offset, 4)
def test_ast_asdl_signature(self):
self.assertEqual(ast.withitem.__doc__, "withitem(expr context_expr, expr? optional_vars)")
self.assertEqual(ast.GtE.__doc__, "GtE")
self.assertEqual(ast.Name.__doc__, "Name(identifier id, expr_context ctx)")
self.assertEqual(ast.cmpop.__doc__, "cmpop = Eq | NotEq | Lt | LtE | Gt | GtE | Is | IsNot | In | NotIn")
expressions = [f" | {node.__doc__}" for node in ast.expr.__subclasses__()]
expressions[0] = f"expr = {ast.expr.__subclasses__()[0].__doc__}"
self.assertCountEqual(ast.expr.__doc__.split("\n"), expressions)
def test_issue40614_feature_version(self):
ast.parse('f"{x=}"', feature_version=(3, 8))
with self.assertRaises(SyntaxError):
ast.parse('f"{x=}"', feature_version=(3, 7))
def test_constant_as_name(self):
for constant in "True", "False", "None":
expr = ast.Expression(ast.Name(constant, ast.Load()))
ast.fix_missing_locations(expr)
with self.assertRaisesRegex(ValueError, f"Name node can't be used with '{constant}' constant"):
compile(expr, "<test>", "eval")
class ASTHelpers_Test(unittest.TestCase):
maxDiff = None
def test_parse(self):
a = ast.parse('foo(1 + 1)')
b = compile('foo(1 + 1)', '<unknown>', 'exec', ast.PyCF_ONLY_AST)
self.assertEqual(ast.dump(a), ast.dump(b))
def test_parse_in_error(self):
try:
1/0
except Exception:
with self.assertRaises(SyntaxError) as e:
ast.literal_eval(r"'\U'")
self.assertIsNotNone(e.exception.__context__)
def test_dump(self):
node = ast.parse('spam(eggs, "and cheese")')
self.assertEqual(ast.dump(node),
"Module(body=[Expr(value=Call(func=Name(id='spam', ctx=Load()), "
"args=[Name(id='eggs', ctx=Load()), Constant(value='and cheese')], "
"keywords=[]))], type_ignores=[])"
)
self.assertEqual(ast.dump(node, annotate_fields=False),
"Module([Expr(Call(Name('spam', Load()), [Name('eggs', Load()), "
"Constant('and cheese')], []))], [])"
)
self.assertEqual(ast.dump(node, include_attributes=True),
"Module(body=[Expr(value=Call(func=Name(id='spam', ctx=Load(), "
"lineno=1, col_offset=0, end_lineno=1, end_col_offset=4), "
"args=[Name(id='eggs', ctx=Load(), lineno=1, col_offset=5, "
"end_lineno=1, end_col_offset=9), Constant(value='and cheese', "
"lineno=1, col_offset=11, end_lineno=1, end_col_offset=23)], keywords=[], "
"lineno=1, col_offset=0, end_lineno=1, end_col_offset=24), "
"lineno=1, col_offset=0, end_lineno=1, end_col_offset=24)], type_ignores=[])"
)
def test_dump_indent(self):
node = ast.parse('spam(eggs, "and cheese")')
self.assertEqual(ast.dump(node, indent=3), """\
Module(
body=[
Expr(
value=Call(
func=Name(id='spam', ctx=Load()),
args=[
Name(id='eggs', ctx=Load()),
Constant(value='and cheese')],
keywords=[]))],
type_ignores=[])""")
self.assertEqual(ast.dump(node, annotate_fields=False, indent='\t'), """\
Module(
\t[
\t\tExpr(
\t\t\tCall(
\t\t\t\tName('spam', Load()),
\t\t\t\t[
\t\t\t\t\tName('eggs', Load()),
\t\t\t\t\tConstant('and cheese')],
\t\t\t\t[]))],
\t[])""")
self.assertEqual(ast.dump(node, include_attributes=True, indent=3), """\
Module(
body=[
Expr(
value=Call(
func=Name(
id='spam',
ctx=Load(),
lineno=1,
col_offset=0,
end_lineno=1,
end_col_offset=4),
args=[
Name(
id='eggs',
ctx=Load(),
lineno=1,
col_offset=5,
end_lineno=1,
end_col_offset=9),
Constant(
value='and cheese',
lineno=1,
col_offset=11,
end_lineno=1,
end_col_offset=23)],
keywords=[],
lineno=1,
col_offset=0,
end_lineno=1,
end_col_offset=24),
lineno=1,
col_offset=0,
end_lineno=1,
end_col_offset=24)],
type_ignores=[])""")
def test_dump_incomplete(self):
node = ast.Raise(lineno=3, col_offset=4)
self.assertEqual(ast.dump(node),
"Raise()"
)
self.assertEqual(ast.dump(node, include_attributes=True),
"Raise(lineno=3, col_offset=4)"
)
node = ast.Raise(exc=ast.Name(id='e', ctx=ast.Load()), lineno=3, col_offset=4)
self.assertEqual(ast.dump(node),
"Raise(exc=Name(id='e', ctx=Load()))"
)
self.assertEqual(ast.dump(node, annotate_fields=False),
"Raise(Name('e', Load()))"
)
self.assertEqual(ast.dump(node, include_attributes=True),
"Raise(exc=Name(id='e', ctx=Load()), lineno=3, col_offset=4)"
)
self.assertEqual(ast.dump(node, annotate_fields=False, include_attributes=True),
"Raise(Name('e', Load()), lineno=3, col_offset=4)"
)
node = ast.Raise(cause=ast.Name(id='e', ctx=ast.Load()))
self.assertEqual(ast.dump(node),
"Raise(cause=Name(id='e', ctx=Load()))"
)
self.assertEqual(ast.dump(node, annotate_fields=False),
"Raise(cause=Name('e', Load()))"
)
def test_copy_location(self):
src = ast.parse('1 + 1', mode='eval')
src.body.right = ast.copy_location(ast.Num(2), src.body.right)
self.assertEqual(ast.dump(src, include_attributes=True),
'Expression(body=BinOp(left=Constant(value=1, lineno=1, col_offset=0, '
'end_lineno=1, end_col_offset=1), op=Add(), right=Constant(value=2, '
'lineno=1, col_offset=4, end_lineno=1, end_col_offset=5), lineno=1, '
'col_offset=0, end_lineno=1, end_col_offset=5))'
)
src = ast.Call(col_offset=1, lineno=1, end_lineno=1, end_col_offset=1)
new = ast.copy_location(src, ast.Call(col_offset=None, lineno=None))
self.assertIsNone(new.end_lineno)
self.assertIsNone(new.end_col_offset)
self.assertEqual(new.lineno, 1)
self.assertEqual(new.col_offset, 1)
def test_fix_missing_locations(self):
src = ast.parse('write("spam")')
src.body.append(ast.Expr(ast.Call(ast.Name('spam', ast.Load()),
[ast.Str('eggs')], [])))
self.assertEqual(src, ast.fix_missing_locations(src))
self.maxDiff = None
self.assertEqual(ast.dump(src, include_attributes=True),
"Module(body=[Expr(value=Call(func=Name(id='write', ctx=Load(), "
"lineno=1, col_offset=0, end_lineno=1, end_col_offset=5), "
"args=[Constant(value='spam', lineno=1, col_offset=6, end_lineno=1, "
"end_col_offset=12)], keywords=[], lineno=1, col_offset=0, end_lineno=1, "
"end_col_offset=13), lineno=1, col_offset=0, end_lineno=1, "
"end_col_offset=13), Expr(value=Call(func=Name(id='spam', ctx=Load(), "
"lineno=1, col_offset=0, end_lineno=1, end_col_offset=0), "
"args=[Constant(value='eggs', lineno=1, col_offset=0, end_lineno=1, "
"end_col_offset=0)], keywords=[], lineno=1, col_offset=0, end_lineno=1, "
"end_col_offset=0), lineno=1, col_offset=0, end_lineno=1, end_col_offset=0)], "
"type_ignores=[])"
)
def test_increment_lineno(self):
src = ast.parse('1 + 1', mode='eval')
self.assertEqual(ast.increment_lineno(src, n=3), src)
self.assertEqual(ast.dump(src, include_attributes=True),
'Expression(body=BinOp(left=Constant(value=1, lineno=4, col_offset=0, '
'end_lineno=4, end_col_offset=1), op=Add(), right=Constant(value=1, '
'lineno=4, col_offset=4, end_lineno=4, end_col_offset=5), lineno=4, '
'col_offset=0, end_lineno=4, end_col_offset=5))'
)
# issue10869: do not increment lineno of root twice
src = ast.parse('1 + 1', mode='eval')
self.assertEqual(ast.increment_lineno(src.body, n=3), src.body)
self.assertEqual(ast.dump(src, include_attributes=True),
'Expression(body=BinOp(left=Constant(value=1, lineno=4, col_offset=0, '
'end_lineno=4, end_col_offset=1), op=Add(), right=Constant(value=1, '
'lineno=4, col_offset=4, end_lineno=4, end_col_offset=5), lineno=4, '
'col_offset=0, end_lineno=4, end_col_offset=5))'
)
src = ast.Call(
func=ast.Name("test", ast.Load()), args=[], keywords=[], lineno=1
)
self.assertEqual(ast.increment_lineno(src).lineno, 2)
self.assertIsNone(ast.increment_lineno(src).end_lineno)
def test_iter_fields(self):
node = ast.parse('foo()', mode='eval')
d = dict(ast.iter_fields(node.body))
self.assertEqual(d.pop('func').id, 'foo')
self.assertEqual(d, {'keywords': [], 'args': []})
def test_iter_child_nodes(self):
node = ast.parse("spam(23, 42, eggs='leek')", mode='eval')
self.assertEqual(len(list(ast.iter_child_nodes(node.body))), 4)
iterator = ast.iter_child_nodes(node.body)
self.assertEqual(next(iterator).id, 'spam')
self.assertEqual(next(iterator).value, 23)
self.assertEqual(next(iterator).value, 42)
self.assertEqual(ast.dump(next(iterator)),
"keyword(arg='eggs', value=Constant(value='leek'))"
)
def test_get_docstring(self):
node = ast.parse('"""line one\n line two"""')
self.assertEqual(ast.get_docstring(node),
'line one\nline two')
node = ast.parse('class foo:\n """line one\n line two"""')
self.assertEqual(ast.get_docstring(node.body[0]),
'line one\nline two')
node = ast.parse('def foo():\n """line one\n line two"""')
self.assertEqual(ast.get_docstring(node.body[0]),
'line one\nline two')
node = ast.parse('async def foo():\n """spam\n ham"""')
self.assertEqual(ast.get_docstring(node.body[0]), 'spam\nham')
def test_get_docstring_none(self):
self.assertIsNone(ast.get_docstring(ast.parse('')))
node = ast.parse('x = "not docstring"')
self.assertIsNone(ast.get_docstring(node))
node = ast.parse('def foo():\n pass')
self.assertIsNone(ast.get_docstring(node))
node = ast.parse('class foo:\n pass')
self.assertIsNone(ast.get_docstring(node.body[0]))
node = ast.parse('class foo:\n x = "not docstring"')
self.assertIsNone(ast.get_docstring(node.body[0]))
node = ast.parse('class foo:\n def bar(self): pass')
self.assertIsNone(ast.get_docstring(node.body[0]))
node = ast.parse('def foo():\n pass')
self.assertIsNone(ast.get_docstring(node.body[0]))
node = ast.parse('def foo():\n x = "not docstring"')
self.assertIsNone(ast.get_docstring(node.body[0]))
node = ast.parse('async def foo():\n pass')
self.assertIsNone(ast.get_docstring(node.body[0]))
node = ast.parse('async def foo():\n x = "not docstring"')
self.assertIsNone(ast.get_docstring(node.body[0]))
def test_multi_line_docstring_col_offset_and_lineno_issue16806(self):
node = ast.parse(
'"""line one\nline two"""\n\n'
'def foo():\n """line one\n line two"""\n\n'
' def bar():\n """line one\n line two"""\n'
' """line one\n line two"""\n'
'"""line one\nline two"""\n\n'
)
self.assertEqual(node.body[0].col_offset, 0)
self.assertEqual(node.body[0].lineno, 1)
self.assertEqual(node.body[1].body[0].col_offset, 2)
self.assertEqual(node.body[1].body[0].lineno, 5)
self.assertEqual(node.body[1].body[1].body[0].col_offset, 4)
self.assertEqual(node.body[1].body[1].body[0].lineno, 9)
self.assertEqual(node.body[1].body[2].col_offset, 2)
self.assertEqual(node.body[1].body[2].lineno, 11)
self.assertEqual(node.body[2].col_offset, 0)
self.assertEqual(node.body[2].lineno, 13)
def test_elif_stmt_start_position(self):
node = ast.parse('if a:\n pass\nelif b:\n pass\n')
elif_stmt = node.body[0].orelse[0]
self.assertEqual(elif_stmt.lineno, 3)
self.assertEqual(elif_stmt.col_offset, 0)
def test_elif_stmt_start_position_with_else(self):
node = ast.parse('if a:\n pass\nelif b:\n pass\nelse:\n pass\n')
elif_stmt = node.body[0].orelse[0]
self.assertEqual(elif_stmt.lineno, 3)
self.assertEqual(elif_stmt.col_offset, 0)
def test_starred_expr_end_position_within_call(self):
node = ast.parse('f(*[0, 1])')
starred_expr = node.body[0].value.args[0]
self.assertEqual(starred_expr.end_lineno, 1)
self.assertEqual(starred_expr.end_col_offset, 9)
def test_literal_eval(self):
self.assertEqual(ast.literal_eval('[1, 2, 3]'), [1, 2, 3])
self.assertEqual(ast.literal_eval('{"foo": 42}'), {"foo": 42})
self.assertEqual(ast.literal_eval('(True, False, None)'), (True, False, None))
self.assertEqual(ast.literal_eval('{1, 2, 3}'), {1, 2, 3})
self.assertEqual(ast.literal_eval('b"hi"'), b"hi")
self.assertEqual(ast.literal_eval('set()'), set())
self.assertRaises(ValueError, ast.literal_eval, 'foo()')
self.assertEqual(ast.literal_eval('6'), 6)
self.assertEqual(ast.literal_eval('+6'), 6)
self.assertEqual(ast.literal_eval('-6'), -6)
self.assertEqual(ast.literal_eval('3.25'), 3.25)
self.assertEqual(ast.literal_eval('+3.25'), 3.25)
self.assertEqual(ast.literal_eval('-3.25'), -3.25)
self.assertEqual(repr(ast.literal_eval('-0.0')), '-0.0')
self.assertRaises(ValueError, ast.literal_eval, '++6')
self.assertRaises(ValueError, ast.literal_eval, '+True')
self.assertRaises(ValueError, ast.literal_eval, '2+3')
def test_literal_eval_complex(self):
# Issue #4907
self.assertEqual(ast.literal_eval('6j'), 6j)
self.assertEqual(ast.literal_eval('-6j'), -6j)
self.assertEqual(ast.literal_eval('6.75j'), 6.75j)
self.assertEqual(ast.literal_eval('-6.75j'), -6.75j)
self.assertEqual(ast.literal_eval('3+6j'), 3+6j)
self.assertEqual(ast.literal_eval('-3+6j'), -3+6j)
self.assertEqual(ast.literal_eval('3-6j'), 3-6j)
self.assertEqual(ast.literal_eval('-3-6j'), -3-6j)
self.assertEqual(ast.literal_eval('3.25+6.75j'), 3.25+6.75j)
self.assertEqual(ast.literal_eval('-3.25+6.75j'), -3.25+6.75j)
self.assertEqual(ast.literal_eval('3.25-6.75j'), 3.25-6.75j)
self.assertEqual(ast.literal_eval('-3.25-6.75j'), -3.25-6.75j)
self.assertEqual(ast.literal_eval('(3+6j)'), 3+6j)
self.assertRaises(ValueError, ast.literal_eval, '-6j+3')
self.assertRaises(ValueError, ast.literal_eval, '-6j+3j')
self.assertRaises(ValueError, ast.literal_eval, '3+-6j')
self.assertRaises(ValueError, ast.literal_eval, '3+(0+6j)')
self.assertRaises(ValueError, ast.literal_eval, '-(3+6j)')
def test_literal_eval_malformed_dict_nodes(self):
malformed = ast.Dict(keys=[ast.Constant(1), ast.Constant(2)], values=[ast.Constant(3)])
self.assertRaises(ValueError, ast.literal_eval, malformed)
malformed = ast.Dict(keys=[ast.Constant(1)], values=[ast.Constant(2), ast.Constant(3)])
self.assertRaises(ValueError, ast.literal_eval, malformed)
def test_literal_eval_trailing_ws(self):
self.assertEqual(ast.literal_eval(" -1"), -1)
self.assertEqual(ast.literal_eval("\t\t-1"), -1)
self.assertEqual(ast.literal_eval(" \t -1"), -1)
self.assertRaises(IndentationError, ast.literal_eval, "\n -1")
def test_literal_eval_malformed_lineno(self):
msg = r'malformed node or string on line 3:'
with self.assertRaisesRegex(ValueError, msg):
ast.literal_eval("{'a': 1,\n'b':2,\n'c':++3,\n'd':4}")
node = ast.UnaryOp(
ast.UAdd(), ast.UnaryOp(ast.UAdd(), ast.Constant(6)))
self.assertIsNone(getattr(node, 'lineno', None))
msg = r'malformed node or string:'
with self.assertRaisesRegex(ValueError, msg):
ast.literal_eval(node)
def test_bad_integer(self):
# issue13436: Bad error message with invalid numeric values
body = [ast.ImportFrom(module='time',
names=[ast.alias(name='sleep')],
level=None,
lineno=None, col_offset=None)]
mod = ast.Module(body, [])
with self.assertRaises(ValueError) as cm:
compile(mod, 'test', 'exec')
self.assertIn("invalid integer value: None", str(cm.exception))
def test_level_as_none(self):
body = [ast.ImportFrom(module='time',
names=[ast.alias(name='sleep',
lineno=0, col_offset=0)],
level=None,
lineno=0, col_offset=0)]
mod = ast.Module(body, [])
code = compile(mod, 'test', 'exec')
ns = {}
exec(code, ns)
self.assertIn('sleep', ns)
class ASTValidatorTests(unittest.TestCase):
def mod(self, mod, msg=None, mode="exec", *, exc=ValueError):
mod.lineno = mod.col_offset = 0
ast.fix_missing_locations(mod)
if msg is None:
compile(mod, "<test>", mode)
else:
with self.assertRaises(exc) as cm:
compile(mod, "<test>", mode)
self.assertIn(msg, str(cm.exception))
def expr(self, node, msg=None, *, exc=ValueError):
mod = ast.Module([ast.Expr(node)], [])
self.mod(mod, msg, exc=exc)
def stmt(self, stmt, msg=None):
mod = ast.Module([stmt], [])
self.mod(mod, msg)
def test_module(self):
m = ast.Interactive([ast.Expr(ast.Name("x", ast.Store()))])
self.mod(m, "must have Load context", "single")
m = ast.Expression(ast.Name("x", ast.Store()))
self.mod(m, "must have Load context", "eval")
def _check_arguments(self, fac, check):
def arguments(args=None, posonlyargs=None, vararg=None,
kwonlyargs=None, kwarg=None,
defaults=None, kw_defaults=None):
if args is None:
args = []
if posonlyargs is None:
posonlyargs = []
if kwonlyargs is None:
kwonlyargs = []
if defaults is None:
defaults = []
if kw_defaults is None:
kw_defaults = []
args = ast.arguments(args, posonlyargs, vararg, kwonlyargs,
kw_defaults, kwarg, defaults)
return fac(args)
args = [ast.arg("x", ast.Name("x", ast.Store()))]
check(arguments(args=args), "must have Load context")
check(arguments(posonlyargs=args), "must have Load context")
check(arguments(kwonlyargs=args), "must have Load context")
check(arguments(defaults=[ast.Num(3)]),
"more positional defaults than args")
check(arguments(kw_defaults=[ast.Num(4)]),
"length of kwonlyargs is not the same as kw_defaults")
args = [ast.arg("x", ast.Name("x", ast.Load()))]
check(arguments(args=args, defaults=[ast.Name("x", ast.Store())]),
"must have Load context")
args = [ast.arg("a", ast.Name("x", ast.Load())),
ast.arg("b", ast.Name("y", ast.Load()))]
check(arguments(kwonlyargs=args,
kw_defaults=[None, ast.Name("x", ast.Store())]),
"must have Load context")
def test_funcdef(self):
a = ast.arguments([], [], None, [], [], None, [])
f = ast.FunctionDef("x", a, [], [], None)
self.stmt(f, "empty body on FunctionDef")
f = ast.FunctionDef("x", a, [ast.Pass()], [ast.Name("x", ast.Store())],
None)
self.stmt(f, "must have Load context")
f = ast.FunctionDef("x", a, [ast.Pass()], [],
ast.Name("x", ast.Store()))
self.stmt(f, "must have Load context")
def fac(args):
return ast.FunctionDef("x", args, [ast.Pass()], [], None)
self._check_arguments(fac, self.stmt)
def test_classdef(self):
def cls(bases=None, keywords=None, body=None, decorator_list=None):
if bases is None:
bases = []
if keywords is None:
keywords = []
if body is None:
body = [ast.Pass()]
if decorator_list is None:
decorator_list = []
return ast.ClassDef("myclass", bases, keywords,
body, decorator_list)
self.stmt(cls(bases=[ast.Name("x", ast.Store())]),
"must have Load context")
self.stmt(cls(keywords=[ast.keyword("x", ast.Name("x", ast.Store()))]),
"must have Load context")
self.stmt(cls(body=[]), "empty body on ClassDef")
self.stmt(cls(body=[None]), "None disallowed")
self.stmt(cls(decorator_list=[ast.Name("x", ast.Store())]),
"must have Load context")
def test_delete(self):
self.stmt(ast.Delete([]), "empty targets on Delete")
self.stmt(ast.Delete([None]), "None disallowed")
self.stmt(ast.Delete([ast.Name("x", ast.Load())]),
"must have Del context")
def test_assign(self):
self.stmt(ast.Assign([], ast.Num(3)), "empty targets on Assign")
self.stmt(ast.Assign([None], ast.Num(3)), "None disallowed")
self.stmt(ast.Assign([ast.Name("x", ast.Load())], ast.Num(3)),
"must have Store context")
self.stmt(ast.Assign([ast.Name("x", ast.Store())],
ast.Name("y", ast.Store())),
"must have Load context")
def test_augassign(self):
aug = ast.AugAssign(ast.Name("x", ast.Load()), ast.Add(),
ast.Name("y", ast.Load()))
self.stmt(aug, "must have Store context")
aug = ast.AugAssign(ast.Name("x", ast.Store()), ast.Add(),
ast.Name("y", ast.Store()))
self.stmt(aug, "must have Load context")
def test_for(self):
x = ast.Name("x", ast.Store())
y = ast.Name("y", ast.Load())
p = ast.Pass()
self.stmt(ast.For(x, y, [], []), "empty body on For")
self.stmt(ast.For(ast.Name("x", ast.Load()), y, [p], []),
"must have Store context")
self.stmt(ast.For(x, ast.Name("y", ast.Store()), [p], []),
"must have Load context")
e = ast.Expr(ast.Name("x", ast.Store()))
self.stmt(ast.For(x, y, [e], []), "must have Load context")
self.stmt(ast.For(x, y, [p], [e]), "must have Load context")
def test_while(self):
self.stmt(ast.While(ast.Num(3), [], []), "empty body on While")
self.stmt(ast.While(ast.Name("x", ast.Store()), [ast.Pass()], []),
"must have Load context")
self.stmt(ast.While(ast.Num(3), [ast.Pass()],
[ast.Expr(ast.Name("x", ast.Store()))]),
"must have Load context")
def test_if(self):
self.stmt(ast.If(ast.Num(3), [], []), "empty body on If")
i = ast.If(ast.Name("x", ast.Store()), [ast.Pass()], [])
self.stmt(i, "must have Load context")
i = ast.If(ast.Num(3), [ast.Expr(ast.Name("x", ast.Store()))], [])
self.stmt(i, "must have Load context")
i = ast.If(ast.Num(3), [ast.Pass()],
[ast.Expr(ast.Name("x", ast.Store()))])
self.stmt(i, "must have Load context")
def test_with(self):
p = ast.Pass()
self.stmt(ast.With([], [p]), "empty items on With")
i = ast.withitem(ast.Num(3), None)
self.stmt(ast.With([i], []), "empty body on With")
i = ast.withitem(ast.Name("x", ast.Store()), None)
self.stmt(ast.With([i], [p]), "must have Load context")
i = ast.withitem(ast.Num(3), ast.Name("x", ast.Load()))
self.stmt(ast.With([i], [p]), "must have Store context")
def test_raise(self):
r = ast.Raise(None, ast.Num(3))
self.stmt(r, "Raise with cause but no exception")
r = ast.Raise(ast.Name("x", ast.Store()), None)
self.stmt(r, "must have Load context")
r = ast.Raise(ast.Num(4), ast.Name("x", ast.Store()))
self.stmt(r, "must have Load context")
def test_try(self):
p = ast.Pass()
t = ast.Try([], [], [], [p])
self.stmt(t, "empty body on Try")
t = ast.Try([ast.Expr(ast.Name("x", ast.Store()))], [], [], [p])
self.stmt(t, "must have Load context")
t = ast.Try([p], [], [], [])
self.stmt(t, "Try has neither except handlers nor finalbody")
t = ast.Try([p], [], [p], [p])
self.stmt(t, "Try has orelse but no except handlers")
t = ast.Try([p], [ast.ExceptHandler(None, "x", [])], [], [])
self.stmt(t, "empty body on ExceptHandler")
e = [ast.ExceptHandler(ast.Name("x", ast.Store()), "y", [p])]
self.stmt(ast.Try([p], e, [], []), "must have Load context")
e = [ast.ExceptHandler(None, "x", [p])]
t = ast.Try([p], e, [ast.Expr(ast.Name("x", ast.Store()))], [p])
self.stmt(t, "must have Load context")
t = ast.Try([p], e, [p], [ast.Expr(ast.Name("x", ast.Store()))])
self.stmt(t, "must have Load context")
def test_assert(self):
self.stmt(ast.Assert(ast.Name("x", ast.Store()), None),
"must have Load context")
assrt = ast.Assert(ast.Name("x", ast.Load()),
ast.Name("y", ast.Store()))
self.stmt(assrt, "must have Load context")
def test_import(self):
self.stmt(ast.Import([]), "empty names on Import")
def test_importfrom(self):
imp = ast.ImportFrom(None, [ast.alias("x", None)], -42)
self.stmt(imp, "Negative ImportFrom level")
self.stmt(ast.ImportFrom(None, [], 0), "empty names on ImportFrom")
def test_global(self):
self.stmt(ast.Global([]), "empty names on Global")
def test_nonlocal(self):
self.stmt(ast.Nonlocal([]), "empty names on Nonlocal")
def test_expr(self):
e = ast.Expr(ast.Name("x", ast.Store()))
self.stmt(e, "must have Load context")
def test_boolop(self):
b = ast.BoolOp(ast.And(), [])
self.expr(b, "less than 2 values")
b = ast.BoolOp(ast.And(), [ast.Num(3)])
self.expr(b, "less than 2 values")
b = ast.BoolOp(ast.And(), [ast.Num(4), None])
self.expr(b, "None disallowed")
b = ast.BoolOp(ast.And(), [ast.Num(4), ast.Name("x", ast.Store())])
self.expr(b, "must have Load context")
def test_unaryop(self):
u = ast.UnaryOp(ast.Not(), ast.Name("x", ast.Store()))
self.expr(u, "must have Load context")
def test_lambda(self):
a = ast.arguments([], [], None, [], [], None, [])
self.expr(ast.Lambda(a, ast.Name("x", ast.Store())),
"must have Load context")
def fac(args):
return ast.Lambda(args, ast.Name("x", ast.Load()))
self._check_arguments(fac, self.expr)
def test_ifexp(self):
l = ast.Name("x", ast.Load())
s = ast.Name("y", ast.Store())
for args in (s, l, l), (l, s, l), (l, l, s):
self.expr(ast.IfExp(*args), "must have Load context")
def test_dict(self):
d = ast.Dict([], [ast.Name("x", ast.Load())])
self.expr(d, "same number of keys as values")
d = ast.Dict([ast.Name("x", ast.Load())], [None])
self.expr(d, "None disallowed")
def test_set(self):
self.expr(ast.Set([None]), "None disallowed")
s = ast.Set([ast.Name("x", ast.Store())])
self.expr(s, "must have Load context")
def _check_comprehension(self, fac):
self.expr(fac([]), "comprehension with no generators")
g = ast.comprehension(ast.Name("x", ast.Load()),
ast.Name("x", ast.Load()), [], 0)
self.expr(fac([g]), "must have Store context")
g = ast.comprehension(ast.Name("x", ast.Store()),
ast.Name("x", ast.Store()), [], 0)
self.expr(fac([g]), "must have Load context")
x = ast.Name("x", ast.Store())
y = ast.Name("y", ast.Load())
g = ast.comprehension(x, y, [None], 0)
self.expr(fac([g]), "None disallowed")
g = ast.comprehension(x, y, [ast.Name("x", ast.Store())], 0)
self.expr(fac([g]), "must have Load context")
def _simple_comp(self, fac):
g = ast.comprehension(ast.Name("x", ast.Store()),
ast.Name("x", ast.Load()), [], 0)
self.expr(fac(ast.Name("x", ast.Store()), [g]),
"must have Load context")
def wrap(gens):
return fac(ast.Name("x", ast.Store()), gens)
self._check_comprehension(wrap)
def test_listcomp(self):
self._simple_comp(ast.ListComp)
def test_setcomp(self):
self._simple_comp(ast.SetComp)
def test_generatorexp(self):
self._simple_comp(ast.GeneratorExp)
def test_dictcomp(self):
g = ast.comprehension(ast.Name("y", ast.Store()),
ast.Name("p", ast.Load()), [], 0)
c = ast.DictComp(ast.Name("x", ast.Store()),
ast.Name("y", ast.Load()), [g])
self.expr(c, "must have Load context")
c = ast.DictComp(ast.Name("x", ast.Load()),
ast.Name("y", ast.Store()), [g])
self.expr(c, "must have Load context")
def factory(comps):
k = ast.Name("x", ast.Load())
v = ast.Name("y", ast.Load())
return ast.DictComp(k, v, comps)
self._check_comprehension(factory)
def test_yield(self):
self.expr(ast.Yield(ast.Name("x", ast.Store())), "must have Load")
self.expr(ast.YieldFrom(ast.Name("x", ast.Store())), "must have Load")
def test_compare(self):
left = ast.Name("x", ast.Load())
comp = ast.Compare(left, [ast.In()], [])
self.expr(comp, "no comparators")
comp = ast.Compare(left, [ast.In()], [ast.Num(4), ast.Num(5)])
self.expr(comp, "different number of comparators and operands")
comp = ast.Compare(ast.Num("blah"), [ast.In()], [left])
self.expr(comp)
comp = ast.Compare(left, [ast.In()], [ast.Num("blah")])
self.expr(comp)
def test_call(self):
func = ast.Name("x", ast.Load())
args = [ast.Name("y", ast.Load())]
keywords = [ast.keyword("w", ast.Name("z", ast.Load()))]
call = ast.Call(ast.Name("x", ast.Store()), args, keywords)
self.expr(call, "must have Load context")
call = ast.Call(func, [None], keywords)
self.expr(call, "None disallowed")
bad_keywords = [ast.keyword("w", ast.Name("z", ast.Store()))]
call = ast.Call(func, args, bad_keywords)
self.expr(call, "must have Load context")
def test_num(self):
class subint(int):
pass
class subfloat(float):
pass
class subcomplex(complex):
pass
for obj in "0", "hello":
self.expr(ast.Num(obj))
for obj in subint(), subfloat(), subcomplex():
self.expr(ast.Num(obj), "invalid type", exc=TypeError)
def test_attribute(self):
attr = ast.Attribute(ast.Name("x", ast.Store()), "y", ast.Load())
self.expr(attr, "must have Load context")
def test_subscript(self):
sub = ast.Subscript(ast.Name("x", ast.Store()), ast.Num(3),
ast.Load())
self.expr(sub, "must have Load context")
x = ast.Name("x", ast.Load())
sub = ast.Subscript(x, ast.Name("y", ast.Store()),
ast.Load())
self.expr(sub, "must have Load context")
s = ast.Name("x", ast.Store())
for args in (s, None, None), (None, s, None), (None, None, s):
sl = ast.Slice(*args)
self.expr(ast.Subscript(x, sl, ast.Load()),
"must have Load context")
sl = ast.Tuple([], ast.Load())
self.expr(ast.Subscript(x, sl, ast.Load()))
sl = ast.Tuple([s], ast.Load())
self.expr(ast.Subscript(x, sl, ast.Load()), "must have Load context")
def test_starred(self):
left = ast.List([ast.Starred(ast.Name("x", ast.Load()), ast.Store())],
ast.Store())
assign = ast.Assign([left], ast.Num(4))
self.stmt(assign, "must have Store context")
def _sequence(self, fac):
self.expr(fac([None], ast.Load()), "None disallowed")
self.expr(fac([ast.Name("x", ast.Store())], ast.Load()),
"must have Load context")
def test_list(self):
self._sequence(ast.List)
def test_tuple(self):
self._sequence(ast.Tuple)
def test_nameconstant(self):
self.expr(ast.NameConstant(4))
def test_stdlib_validates(self):
stdlib = os.path.dirname(ast.__file__)
tests = [fn for fn in os.listdir(stdlib) if fn.endswith(".py")]
tests.extend(["test/test_grammar.py", "test/test_unpack_ex.py"])
for module in tests:
with self.subTest(module):
fn = os.path.join(stdlib, module)
with open(fn, "r", encoding="utf-8") as fp:
source = fp.read()
mod = ast.parse(source, fn)
compile(mod, fn, "exec")
class ConstantTests(unittest.TestCase):
"""Tests on the ast.Constant node type."""
def compile_constant(self, value):
tree = ast.parse("x = 123")
node = tree.body[0].value
new_node = ast.Constant(value=value)
ast.copy_location(new_node, node)
tree.body[0].value = new_node
code = compile(tree, "<string>", "exec")
ns = {}
exec(code, ns)
return ns['x']
def test_validation(self):
with self.assertRaises(TypeError) as cm:
self.compile_constant([1, 2, 3])
self.assertEqual(str(cm.exception),
"got an invalid type in Constant: list")
def test_singletons(self):
for const in (None, False, True, Ellipsis, b'', frozenset()):
with self.subTest(const=const):
value = self.compile_constant(const)
self.assertIs(value, const)
def test_values(self):
nested_tuple = (1,)
nested_frozenset = frozenset({1})
for level in range(3):
nested_tuple = (nested_tuple, 2)
nested_frozenset = frozenset({nested_frozenset, 2})
values = (123, 123.0, 123j,
"unicode", b'bytes',
tuple("tuple"), frozenset("frozenset"),
nested_tuple, nested_frozenset)
for value in values:
with self.subTest(value=value):
result = self.compile_constant(value)
self.assertEqual(result, value)
def test_assign_to_constant(self):
tree = ast.parse("x = 1")
target = tree.body[0].targets[0]
new_target = ast.Constant(value=1)
ast.copy_location(new_target, target)
tree.body[0].targets[0] = new_target
with self.assertRaises(ValueError) as cm:
compile(tree, "string", "exec")
self.assertEqual(str(cm.exception),
"expression which can't be assigned "
"to in Store context")
def test_get_docstring(self):
tree = ast.parse("'docstring'\nx = 1")
self.assertEqual(ast.get_docstring(tree), 'docstring')
def get_load_const(self, tree):
# Compile to bytecode, disassemble and get parameter of LOAD_CONST
# instructions
co = compile(tree, '<string>', 'exec')
consts = []
for instr in dis.get_instructions(co):
if instr.opname == 'LOAD_CONST':
consts.append(instr.argval)
return consts
@support.cpython_only
def test_load_const(self):
consts = [None,
True, False,
124,
2.0,
3j,
"unicode",
b'bytes',
(1, 2, 3)]
code = '\n'.join(['x={!r}'.format(const) for const in consts])
code += '\nx = ...'
consts.extend((Ellipsis, None))
tree = ast.parse(code)
self.assertEqual(self.get_load_const(tree),
consts)
# Replace expression nodes with constants
for assign, const in zip(tree.body, consts):
assert isinstance(assign, ast.Assign), ast.dump(assign)
new_node = ast.Constant(value=const)
ast.copy_location(new_node, assign.value)
assign.value = new_node
self.assertEqual(self.get_load_const(tree),
consts)
def test_literal_eval(self):
tree = ast.parse("1 + 2")
binop = tree.body[0].value
new_left = ast.Constant(value=10)
ast.copy_location(new_left, binop.left)
binop.left = new_left
new_right = ast.Constant(value=20j)
ast.copy_location(new_right, binop.right)
binop.right = new_right
self.assertEqual(ast.literal_eval(binop), 10+20j)
def test_string_kind(self):
c = ast.parse('"x"', mode='eval').body
self.assertEqual(c.value, "x")
self.assertEqual(c.kind, None)
c = ast.parse('u"x"', mode='eval').body
self.assertEqual(c.value, "x")
self.assertEqual(c.kind, "u")
c = ast.parse('r"x"', mode='eval').body
self.assertEqual(c.value, "x")
self.assertEqual(c.kind, None)
c = ast.parse('b"x"', mode='eval').body
self.assertEqual(c.value, b"x")
self.assertEqual(c.kind, None)
class EndPositionTests(unittest.TestCase):
"""Tests for end position of AST nodes.
Testing end positions of nodes requires a bit of extra care
because of how LL parsers work.
"""
def _check_end_pos(self, ast_node, end_lineno, end_col_offset):
self.assertEqual(ast_node.end_lineno, end_lineno)
self.assertEqual(ast_node.end_col_offset, end_col_offset)
def _check_content(self, source, ast_node, content):
self.assertEqual(ast.get_source_segment(source, ast_node), content)
def _parse_value(self, s):
# Use duck-typing to support both single expression
# and a right hand side of an assignment statement.
return ast.parse(s).body[0].value
def test_lambda(self):
s = 'lambda x, *y: None'
lam = self._parse_value(s)
self._check_content(s, lam.body, 'None')
self._check_content(s, lam.args.args[0], 'x')
self._check_content(s, lam.args.vararg, 'y')
def test_func_def(self):
s = dedent('''
def func(x: int,
*args: str,
z: float = 0,
**kwargs: Any) -> bool:
return True
''').strip()
fdef = ast.parse(s).body[0]
self._check_end_pos(fdef, 5, 15)
self._check_content(s, fdef.body[0], 'return True')
self._check_content(s, fdef.args.args[0], 'x: int')
self._check_content(s, fdef.args.args[0].annotation, 'int')
self._check_content(s, fdef.args.kwarg, 'kwargs: Any')
self._check_content(s, fdef.args.kwarg.annotation, 'Any')
def test_call(self):
s = 'func(x, y=2, **kw)'
call = self._parse_value(s)
self._check_content(s, call.func, 'func')
self._check_content(s, call.keywords[0].value, '2')
self._check_content(s, call.keywords[1].value, 'kw')
def test_call_noargs(self):
s = 'x[0]()'
call = self._parse_value(s)
self._check_content(s, call.func, 'x[0]')
self._check_end_pos(call, 1, 6)
def test_class_def(self):
s = dedent('''
class C(A, B):
x: int = 0
''').strip()
cdef = ast.parse(s).body[0]
self._check_end_pos(cdef, 2, 14)
self._check_content(s, cdef.bases[1], 'B')
self._check_content(s, cdef.body[0], 'x: int = 0')
def test_class_kw(self):
s = 'class S(metaclass=abc.ABCMeta): pass'
cdef = ast.parse(s).body[0]
self._check_content(s, cdef.keywords[0].value, 'abc.ABCMeta')
def test_multi_line_str(self):
s = dedent('''
x = """Some multi-line text.
It goes on starting from same indent."""
''').strip()
assign = ast.parse(s).body[0]
self._check_end_pos(assign, 3, 40)
self._check_end_pos(assign.value, 3, 40)
def test_continued_str(self):
s = dedent('''
x = "first part" \\
"second part"
''').strip()
assign = ast.parse(s).body[0]
self._check_end_pos(assign, 2, 13)
self._check_end_pos(assign.value, 2, 13)
def test_suites(self):
# We intentionally put these into the same string to check
# that empty lines are not part of the suite.
s = dedent('''
while True:
pass
if one():
x = None
elif other():
y = None
else:
z = None
for x, y in stuff:
assert True
try:
raise RuntimeError
except TypeError as e:
pass
pass
''').strip()
mod = ast.parse(s)
while_loop = mod.body[0]
if_stmt = mod.body[1]
for_loop = mod.body[2]
try_stmt = mod.body[3]
pass_stmt = mod.body[4]
self._check_end_pos(while_loop, 2, 8)
self._check_end_pos(if_stmt, 9, 12)
self._check_end_pos(for_loop, 12, 15)
self._check_end_pos(try_stmt, 17, 8)
self._check_end_pos(pass_stmt, 19, 4)
self._check_content(s, while_loop.test, 'True')
self._check_content(s, if_stmt.body[0], 'x = None')
self._check_content(s, if_stmt.orelse[0].test, 'other()')
self._check_content(s, for_loop.target, 'x, y')
self._check_content(s, try_stmt.body[0], 'raise RuntimeError')
self._check_content(s, try_stmt.handlers[0].type, 'TypeError')
def test_fstring(self):
s = 'x = f"abc {x + y} abc"'
fstr = self._parse_value(s)
binop = fstr.values[1].value
self._check_content(s, binop, 'x + y')
def test_fstring_multi_line(self):
s = dedent('''
f"""Some multi-line text.
{
arg_one
+
arg_two
}
It goes on..."""
''').strip()
fstr = self._parse_value(s)
binop = fstr.values[1].value
self._check_end_pos(binop, 5, 7)
self._check_content(s, binop.left, 'arg_one')
self._check_content(s, binop.right, 'arg_two')
def test_import_from_multi_line(self):
s = dedent('''
from x.y.z import (
a, b, c as c
)
''').strip()
imp = ast.parse(s).body[0]
self._check_end_pos(imp, 3, 1)
self._check_end_pos(imp.names[2], 2, 16)
def test_slices(self):
s1 = 'f()[1, 2] [0]'
s2 = 'x[ a.b: c.d]'
sm = dedent('''
x[ a.b: f () ,
g () : c.d
]
''').strip()
i1, i2, im = map(self._parse_value, (s1, s2, sm))
self._check_content(s1, i1.value, 'f()[1, 2]')
self._check_content(s1, i1.value.slice, '1, 2')
self._check_content(s2, i2.slice.lower, 'a.b')
self._check_content(s2, i2.slice.upper, 'c.d')
self._check_content(sm, im.slice.elts[0].upper, 'f ()')
self._check_content(sm, im.slice.elts[1].lower, 'g ()')
self._check_end_pos(im, 3, 3)
def test_binop(self):
s = dedent('''
(1 * 2 + (3 ) +
4
)
''').strip()
binop = self._parse_value(s)
self._check_end_pos(binop, 2, 6)
self._check_content(s, binop.right, '4')
self._check_content(s, binop.left, '1 * 2 + (3 )')
self._check_content(s, binop.left.right, '3')
def test_boolop(self):
s = dedent('''
if (one_condition and
(other_condition or yet_another_one)):
pass
''').strip()
bop = ast.parse(s).body[0].test
self._check_end_pos(bop, 2, 44)
self._check_content(s, bop.values[1],
'other_condition or yet_another_one')
def test_tuples(self):
s1 = 'x = () ;'
s2 = 'x = 1 , ;'
s3 = 'x = (1 , 2 ) ;'
sm = dedent('''
x = (
a, b,
)
''').strip()
t1, t2, t3, tm = map(self._parse_value, (s1, s2, s3, sm))
self._check_content(s1, t1, '()')
self._check_content(s2, t2, '1 ,')
self._check_content(s3, t3, '(1 , 2 )')
self._check_end_pos(tm, 3, 1)
def test_attribute_spaces(self):
s = 'func(x. y .z)'
call = self._parse_value(s)
self._check_content(s, call, s)
self._check_content(s, call.args[0], 'x. y .z')
def test_redundant_parenthesis(self):
s = '( ( ( a + b ) ) )'
v = ast.parse(s).body[0].value
self.assertEqual(type(v).__name__, 'BinOp')
self._check_content(s, v, 'a + b')
s2 = 'await ' + s
v = ast.parse(s2).body[0].value.value
self.assertEqual(type(v).__name__, 'BinOp')
self._check_content(s2, v, 'a + b')
def test_trailers_with_redundant_parenthesis(self):
tests = (
('( ( ( a ) ) ) ( )', 'Call'),
('( ( ( a ) ) ) ( b )', 'Call'),
('( ( ( a ) ) ) [ b ]', 'Subscript'),
('( ( ( a ) ) ) . b', 'Attribute'),
)
for s, t in tests:
with self.subTest(s):
v = ast.parse(s).body[0].value
self.assertEqual(type(v).__name__, t)
self._check_content(s, v, s)
s2 = 'await ' + s
v = ast.parse(s2).body[0].value.value
self.assertEqual(type(v).__name__, t)
self._check_content(s2, v, s)
def test_displays(self):
s1 = '[{}, {1, }, {1, 2,} ]'
s2 = '{a: b, f (): g () ,}'
c1 = self._parse_value(s1)
c2 = self._parse_value(s2)
self._check_content(s1, c1.elts[0], '{}')
self._check_content(s1, c1.elts[1], '{1, }')
self._check_content(s1, c1.elts[2], '{1, 2,}')
self._check_content(s2, c2.keys[1], 'f ()')
self._check_content(s2, c2.values[1], 'g ()')
def test_comprehensions(self):
s = dedent('''
x = [{x for x, y in stuff
if cond.x} for stuff in things]
''').strip()
cmp = self._parse_value(s)
self._check_end_pos(cmp, 2, 37)
self._check_content(s, cmp.generators[0].iter, 'things')
self._check_content(s, cmp.elt.generators[0].iter, 'stuff')
self._check_content(s, cmp.elt.generators[0].ifs[0], 'cond.x')
self._check_content(s, cmp.elt.generators[0].target, 'x, y')
def test_yield_await(self):
s = dedent('''
async def f():
yield x
await y
''').strip()
fdef = ast.parse(s).body[0]
self._check_content(s, fdef.body[0].value, 'yield x')
self._check_content(s, fdef.body[1].value, 'await y')
def test_source_segment_multi(self):
s_orig = dedent('''
x = (
a, b,
) + ()
''').strip()
s_tuple = dedent('''
(
a, b,
)
''').strip()
binop = self._parse_value(s_orig)
self.assertEqual(ast.get_source_segment(s_orig, binop.left), s_tuple)
def test_source_segment_padded(self):
s_orig = dedent('''
class C:
def fun(self) -> None:
"ЖЖЖЖЖ"
''').strip()
s_method = ' def fun(self) -> None:\n' \
' "ЖЖЖЖЖ"'
cdef = ast.parse(s_orig).body[0]
self.assertEqual(ast.get_source_segment(s_orig, cdef.body[0], padded=True),
s_method)
def test_source_segment_endings(self):
s = 'v = 1\r\nw = 1\nx = 1\n\ry = 1\rz = 1\r\n'
v, w, x, y, z = ast.parse(s).body
self._check_content(s, v, 'v = 1')
self._check_content(s, w, 'w = 1')
self._check_content(s, x, 'x = 1')
self._check_content(s, y, 'y = 1')
self._check_content(s, z, 'z = 1')
def test_source_segment_tabs(self):
s = dedent('''
class C:
\t\f def fun(self) -> None:
\t\f pass
''').strip()
s_method = ' \t\f def fun(self) -> None:\n' \
' \t\f pass'
cdef = ast.parse(s).body[0]
self.assertEqual(ast.get_source_segment(s, cdef.body[0], padded=True), s_method)
def test_source_segment_missing_info(self):
s = 'v = 1\r\nw = 1\nx = 1\n\ry = 1\r\n'
v, w, x, y = ast.parse(s).body
del v.lineno
del w.end_lineno
del x.col_offset
del y.end_col_offset
self.assertIsNone(ast.get_source_segment(s, v))
self.assertIsNone(ast.get_source_segment(s, w))
self.assertIsNone(ast.get_source_segment(s, x))
self.assertIsNone(ast.get_source_segment(s, y))
class NodeVisitorTests(unittest.TestCase):
def test_old_constant_nodes(self):
class Visitor(ast.NodeVisitor):
def visit_Num(self, node):
log.append((node.lineno, 'Num', node.n))
def visit_Str(self, node):
log.append((node.lineno, 'Str', node.s))
def visit_Bytes(self, node):
log.append((node.lineno, 'Bytes', node.s))
def visit_NameConstant(self, node):
log.append((node.lineno, 'NameConstant', node.value))
def visit_Ellipsis(self, node):
log.append((node.lineno, 'Ellipsis', ...))
mod = ast.parse(dedent('''\
i = 42
f = 4.25
c = 4.25j
s = 'string'
b = b'bytes'
t = True
n = None
e = ...
'''))
visitor = Visitor()
log = []
with warnings.catch_warnings(record=True) as wlog:
warnings.filterwarnings('always', '', DeprecationWarning)
visitor.visit(mod)
self.assertEqual(log, [
(1, 'Num', 42),
(2, 'Num', 4.25),
(3, 'Num', 4.25j),
(4, 'Str', 'string'),
(5, 'Bytes', b'bytes'),
(6, 'NameConstant', True),
(7, 'NameConstant', None),
(8, 'Ellipsis', ...),
])
self.assertEqual([str(w.message) for w in wlog], [
'visit_Num is deprecated; add visit_Constant',
'visit_Num is deprecated; add visit_Constant',
'visit_Num is deprecated; add visit_Constant',
'visit_Str is deprecated; add visit_Constant',
'visit_Bytes is deprecated; add visit_Constant',
'visit_NameConstant is deprecated; add visit_Constant',
'visit_NameConstant is deprecated; add visit_Constant',
'visit_Ellipsis is deprecated; add visit_Constant',
])
@support.cpython_only
class ModuleStateTests(unittest.TestCase):
# bpo-41194, bpo-41261, bpo-41631: The _ast module uses a global state.
def check_ast_module(self):
# Check that the _ast module still works as expected
code = 'x + 1'
filename = '<string>'
mode = 'eval'
# Create _ast.AST subclasses instances
ast_tree = compile(code, filename, mode, flags=ast.PyCF_ONLY_AST)
# Call PyAST_Check()
code = compile(ast_tree, filename, mode)
self.assertIsInstance(code, types.CodeType)
def test_reload_module(self):
# bpo-41194: Importing the _ast module twice must not crash.
with support.swap_item(sys.modules, '_ast', None):
del sys.modules['_ast']
import _ast as ast1
del sys.modules['_ast']
import _ast as ast2
self.check_ast_module()
# Unloading the two _ast module instances must not crash.
del ast1
del ast2
support.gc_collect()
self.check_ast_module()
def test_sys_modules(self):
# bpo-41631: Test reproducing a Mercurial crash when PyAST_Check()
# imported the _ast module internally.
lazy_mod = object()
def my_import(name, *args, **kw):
sys.modules[name] = lazy_mod
return lazy_mod
with support.swap_item(sys.modules, '_ast', None):
del sys.modules['_ast']
with support.swap_attr(builtins, '__import__', my_import):
# Test that compile() does not import the _ast module
self.check_ast_module()
self.assertNotIn('_ast', sys.modules)
# Sanity check of the test itself
import _ast
self.assertIs(_ast, lazy_mod)
def test_subinterpreter(self):
# bpo-41631: Importing and using the _ast module in a subinterpreter
# must not crash.
code = dedent('''
import _ast
import ast
import gc
import sys
import types
# Create _ast.AST subclasses instances and call PyAST_Check()
ast_tree = compile('x+1', '<string>', 'eval',
flags=ast.PyCF_ONLY_AST)
code = compile(ast_tree, 'string', 'eval')
if not isinstance(code, types.CodeType):
raise AssertionError
# Unloading the _ast module must not crash.
del ast, _ast
del sys.modules['ast'], sys.modules['_ast']
gc.collect()
''')
res = support.run_in_subinterp(code)
self.assertEqual(res, 0)
def main():
if __name__ != '__main__':
return
if sys.argv[1:] == ['-g']:
for statements, kind in ((exec_tests, "exec"), (single_tests, "single"),
(eval_tests, "eval")):
print(kind+"_results = [")
for statement in statements:
tree = ast.parse(statement, "?", kind)
print("%r," % (to_tuple(tree),))
print("]")
print("main()")
raise SystemExit
unittest.main()
#### EVERYTHING BELOW IS GENERATED BY python Lib/test/test_ast.py -g #####
exec_results = [
('Module', [('Expr', (1, 0, 1, 4), ('Constant', (1, 0, 1, 4), None, None))], []),
('Module', [('Expr', (1, 0, 1, 18), ('Constant', (1, 0, 1, 18), 'module docstring', None))], []),
('Module', [('FunctionDef', (1, 0, 1, 13), 'f', ('arguments', [], [], None, [], [], None, []), [('Pass', (1, 9, 1, 13))], [], None, None)], []),
('Module', [('FunctionDef', (1, 0, 1, 29), 'f', ('arguments', [], [], None, [], [], None, []), [('Expr', (1, 9, 1, 29), ('Constant', (1, 9, 1, 29), 'function docstring', None))], [], None, None)], []),
('Module', [('FunctionDef', (1, 0, 1, 14), 'f', ('arguments', [], [('arg', (1, 6, 1, 7), 'a', None, None)], None, [], [], None, []), [('Pass', (1, 10, 1, 14))], [], None, None)], []),
('Module', [('FunctionDef', (1, 0, 1, 16), 'f', ('arguments', [], [('arg', (1, 6, 1, 7), 'a', None, None)], None, [], [], None, [('Constant', (1, 8, 1, 9), 0, None)]), [('Pass', (1, 12, 1, 16))], [], None, None)], []),
('Module', [('FunctionDef', (1, 0, 1, 18), 'f', ('arguments', [], [], ('arg', (1, 7, 1, 11), 'args', None, None), [], [], None, []), [('Pass', (1, 14, 1, 18))], [], None, None)], []),
('Module', [('FunctionDef', (1, 0, 1, 21), 'f', ('arguments', [], [], None, [], [], ('arg', (1, 8, 1, 14), 'kwargs', None, None), []), [('Pass', (1, 17, 1, 21))], [], None, None)], []),
('Module', [('FunctionDef', (1, 0, 1, 71), 'f', ('arguments', [], [('arg', (1, 6, 1, 7), 'a', None, None), ('arg', (1, 9, 1, 10), 'b', None, None), ('arg', (1, 14, 1, 15), 'c', None, None), ('arg', (1, 22, 1, 23), 'd', None, None), ('arg', (1, 28, 1, 29), 'e', None, None)], ('arg', (1, 35, 1, 39), 'args', None, None), [('arg', (1, 41, 1, 42), 'f', None, None)], [('Constant', (1, 43, 1, 45), 42, None)], ('arg', (1, 49, 1, 55), 'kwargs', None, None), [('Constant', (1, 11, 1, 12), 1, None), ('Constant', (1, 16, 1, 20), None, None), ('List', (1, 24, 1, 26), [], ('Load',)), ('Dict', (1, 30, 1, 32), [], [])]), [('Expr', (1, 58, 1, 71), ('Constant', (1, 58, 1, 71), 'doc for f()', None))], [], None, None)], []),
('Module', [('ClassDef', (1, 0, 1, 12), 'C', [], [], [('Pass', (1, 8, 1, 12))], [])], []),
('Module', [('ClassDef', (1, 0, 1, 32), 'C', [], [], [('Expr', (1, 9, 1, 32), ('Constant', (1, 9, 1, 32), 'docstring for class C', None))], [])], []),
('Module', [('ClassDef', (1, 0, 1, 21), 'C', [('Name', (1, 8, 1, 14), 'object', ('Load',))], [], [('Pass', (1, 17, 1, 21))], [])], []),
('Module', [('FunctionDef', (1, 0, 1, 16), 'f', ('arguments', [], [], None, [], [], None, []), [('Return', (1, 8, 1, 16), ('Constant', (1, 15, 1, 16), 1, None))], [], None, None)], []),
('Module', [('Delete', (1, 0, 1, 5), [('Name', (1, 4, 1, 5), 'v', ('Del',))])], []),
('Module', [('Assign', (1, 0, 1, 5), [('Name', (1, 0, 1, 1), 'v', ('Store',))], ('Constant', (1, 4, 1, 5), 1, None), None)], []),
('Module', [('Assign', (1, 0, 1, 7), [('Tuple', (1, 0, 1, 3), [('Name', (1, 0, 1, 1), 'a', ('Store',)), ('Name', (1, 2, 1, 3), 'b', ('Store',))], ('Store',))], ('Name', (1, 6, 1, 7), 'c', ('Load',)), None)], []),
('Module', [('Assign', (1, 0, 1, 9), [('Tuple', (1, 0, 1, 5), [('Name', (1, 1, 1, 2), 'a', ('Store',)), ('Name', (1, 3, 1, 4), 'b', ('Store',))], ('Store',))], ('Name', (1, 8, 1, 9), 'c', ('Load',)), None)], []),
('Module', [('Assign', (1, 0, 1, 9), [('List', (1, 0, 1, 5), [('Name', (1, 1, 1, 2), 'a', ('Store',)), ('Name', (1, 3, 1, 4), 'b', ('Store',))], ('Store',))], ('Name', (1, 8, 1, 9), 'c', ('Load',)), None)], []),
('Module', [('AugAssign', (1, 0, 1, 6), ('Name', (1, 0, 1, 1), 'v', ('Store',)), ('Add',), ('Constant', (1, 5, 1, 6), 1, None))], []),
('Module', [('For', (1, 0, 1, 15), ('Name', (1, 4, 1, 5), 'v', ('Store',)), ('Name', (1, 9, 1, 10), 'v', ('Load',)), [('Pass', (1, 11, 1, 15))], [], None)], []),
('Module', [('While', (1, 0, 1, 12), ('Name', (1, 6, 1, 7), 'v', ('Load',)), [('Pass', (1, 8, 1, 12))], [])], []),
('Module', [('If', (1, 0, 1, 9), ('Name', (1, 3, 1, 4), 'v', ('Load',)), [('Pass', (1, 5, 1, 9))], [])], []),
('Module', [('If', (1, 0, 4, 6), ('Name', (1, 3, 1, 4), 'a', ('Load',)), [('Pass', (2, 2, 2, 6))], [('If', (3, 0, 4, 6), ('Name', (3, 5, 3, 6), 'b', ('Load',)), [('Pass', (4, 2, 4, 6))], [])])], []),
('Module', [('If', (1, 0, 6, 6), ('Name', (1, 3, 1, 4), 'a', ('Load',)), [('Pass', (2, 2, 2, 6))], [('If', (3, 0, 6, 6), ('Name', (3, 5, 3, 6), 'b', ('Load',)), [('Pass', (4, 2, 4, 6))], [('Pass', (6, 2, 6, 6))])])], []),
('Module', [('With', (1, 0, 1, 17), [('withitem', ('Name', (1, 5, 1, 6), 'x', ('Load',)), ('Name', (1, 10, 1, 11), 'y', ('Store',)))], [('Pass', (1, 13, 1, 17))], None)], []),
('Module', [('With', (1, 0, 1, 25), [('withitem', ('Name', (1, 5, 1, 6), 'x', ('Load',)), ('Name', (1, 10, 1, 11), 'y', ('Store',))), ('withitem', ('Name', (1, 13, 1, 14), 'z', ('Load',)), ('Name', (1, 18, 1, 19), 'q', ('Store',)))], [('Pass', (1, 21, 1, 25))], None)], []),
('Module', [('Raise', (1, 0, 1, 25), ('Call', (1, 6, 1, 25), ('Name', (1, 6, 1, 15), 'Exception', ('Load',)), [('Constant', (1, 16, 1, 24), 'string', None)], []), None)], []),
('Module', [('Try', (1, 0, 4, 6), [('Pass', (2, 2, 2, 6))], [('ExceptHandler', (3, 0, 4, 6), ('Name', (3, 7, 3, 16), 'Exception', ('Load',)), None, [('Pass', (4, 2, 4, 6))])], [], [])], []),
('Module', [('Try', (1, 0, 4, 6), [('Pass', (2, 2, 2, 6))], [], [], [('Pass', (4, 2, 4, 6))])], []),
('Module', [('Assert', (1, 0, 1, 8), ('Name', (1, 7, 1, 8), 'v', ('Load',)), None)], []),
('Module', [('Import', (1, 0, 1, 10), [('alias', (1, 7, 1, 10), 'sys', None)])], []),
('Module', [('ImportFrom', (1, 0, 1, 17), 'sys', [('alias', (1, 16, 1, 17), 'v', None)], 0)], []),
('Module', [('Global', (1, 0, 1, 8), ['v'])], []),
('Module', [('Expr', (1, 0, 1, 1), ('Constant', (1, 0, 1, 1), 1, None))], []),
('Module', [('Pass', (1, 0, 1, 4))], []),
('Module', [('For', (1, 0, 1, 16), ('Name', (1, 4, 1, 5), 'v', ('Store',)), ('Name', (1, 9, 1, 10), 'v', ('Load',)), [('Break', (1, 11, 1, 16))], [], None)], []),
('Module', [('For', (1, 0, 1, 19), ('Name', (1, 4, 1, 5), 'v', ('Store',)), ('Name', (1, 9, 1, 10), 'v', ('Load',)), [('Continue', (1, 11, 1, 19))], [], None)], []),
('Module', [('For', (1, 0, 1, 18), ('Tuple', (1, 4, 1, 7), [('Name', (1, 4, 1, 5), 'a', ('Store',)), ('Name', (1, 6, 1, 7), 'b', ('Store',))], ('Store',)), ('Name', (1, 11, 1, 12), 'c', ('Load',)), [('Pass', (1, 14, 1, 18))], [], None)], []),
('Module', [('For', (1, 0, 1, 20), ('Tuple', (1, 4, 1, 9), [('Name', (1, 5, 1, 6), 'a', ('Store',)), ('Name', (1, 7, 1, 8), 'b', ('Store',))], ('Store',)), ('Name', (1, 13, 1, 14), 'c', ('Load',)), [('Pass', (1, 16, 1, 20))], [], None)], []),
('Module', [('For', (1, 0, 1, 20), ('List', (1, 4, 1, 9), [('Name', (1, 5, 1, 6), 'a', ('Store',)), ('Name', (1, 7, 1, 8), 'b', ('Store',))], ('Store',)), ('Name', (1, 13, 1, 14), 'c', ('Load',)), [('Pass', (1, 16, 1, 20))], [], None)], []),
('Module', [('Expr', (1, 0, 11, 5), ('GeneratorExp', (1, 0, 11, 5), ('Tuple', (2, 4, 6, 5), [('Name', (3, 4, 3, 6), 'Aa', ('Load',)), ('Name', (5, 7, 5, 9), 'Bb', ('Load',))], ('Load',)), [('comprehension', ('Tuple', (8, 4, 10, 6), [('Name', (8, 4, 8, 6), 'Aa', ('Store',)), ('Name', (10, 4, 10, 6), 'Bb', ('Store',))], ('Store',)), ('Name', (10, 10, 10, 12), 'Cc', ('Load',)), [], 0)]))], []),
('Module', [('Expr', (1, 0, 1, 34), ('DictComp', (1, 0, 1, 34), ('Name', (1, 1, 1, 2), 'a', ('Load',)), ('Name', (1, 5, 1, 6), 'b', ('Load',)), [('comprehension', ('Name', (1, 11, 1, 12), 'w', ('Store',)), ('Name', (1, 16, 1, 17), 'x', ('Load',)), [], 0), ('comprehension', ('Name', (1, 22, 1, 23), 'm', ('Store',)), ('Name', (1, 27, 1, 28), 'p', ('Load',)), [('Name', (1, 32, 1, 33), 'g', ('Load',))], 0)]))], []),
('Module', [('Expr', (1, 0, 1, 20), ('DictComp', (1, 0, 1, 20), ('Name', (1, 1, 1, 2), 'a', ('Load',)), ('Name', (1, 5, 1, 6), 'b', ('Load',)), [('comprehension', ('Tuple', (1, 11, 1, 14), [('Name', (1, 11, 1, 12), 'v', ('Store',)), ('Name', (1, 13, 1, 14), 'w', ('Store',))], ('Store',)), ('Name', (1, 18, 1, 19), 'x', ('Load',)), [], 0)]))], []),
('Module', [('Expr', (1, 0, 1, 19), ('SetComp', (1, 0, 1, 19), ('Name', (1, 1, 1, 2), 'r', ('Load',)), [('comprehension', ('Name', (1, 7, 1, 8), 'l', ('Store',)), ('Name', (1, 12, 1, 13), 'x', ('Load',)), [('Name', (1, 17, 1, 18), 'g', ('Load',))], 0)]))], []),
('Module', [('Expr', (1, 0, 1, 16), ('SetComp', (1, 0, 1, 16), ('Name', (1, 1, 1, 2), 'r', ('Load',)), [('comprehension', ('Tuple', (1, 7, 1, 10), [('Name', (1, 7, 1, 8), 'l', ('Store',)), ('Name', (1, 9, 1, 10), 'm', ('Store',))], ('Store',)), ('Name', (1, 14, 1, 15), 'x', ('Load',)), [], 0)]))], []),
('Module', [('AsyncFunctionDef', (1, 0, 3, 18), 'f', ('arguments', [], [], None, [], [], None, []), [('Expr', (2, 1, 2, 17), ('Constant', (2, 1, 2, 17), 'async function', None)), ('Expr', (3, 1, 3, 18), ('Await', (3, 1, 3, 18), ('Call', (3, 7, 3, 18), ('Name', (3, 7, 3, 16), 'something', ('Load',)), [], [])))], [], None, None)], []),
('Module', [('AsyncFunctionDef', (1, 0, 3, 8), 'f', ('arguments', [], [], None, [], [], None, []), [('AsyncFor', (2, 1, 3, 8), ('Name', (2, 11, 2, 12), 'e', ('Store',)), ('Name', (2, 16, 2, 17), 'i', ('Load',)), [('Expr', (2, 19, 2, 20), ('Constant', (2, 19, 2, 20), 1, None))], [('Expr', (3, 7, 3, 8), ('Constant', (3, 7, 3, 8), 2, None))], None)], [], None, None)], []),
('Module', [('AsyncFunctionDef', (1, 0, 2, 21), 'f', ('arguments', [], [], None, [], [], None, []), [('AsyncWith', (2, 1, 2, 21), [('withitem', ('Name', (2, 12, 2, 13), 'a', ('Load',)), ('Name', (2, 17, 2, 18), 'b', ('Store',)))], [('Expr', (2, 20, 2, 21), ('Constant', (2, 20, 2, 21), 1, None))], None)], [], None, None)], []),
('Module', [('Expr', (1, 0, 1, 14), ('Dict', (1, 0, 1, 14), [None, ('Constant', (1, 10, 1, 11), 2, None)], [('Dict', (1, 3, 1, 8), [('Constant', (1, 4, 1, 5), 1, None)], [('Constant', (1, 6, 1, 7), 2, None)]), ('Constant', (1, 12, 1, 13), 3, None)]))], []),
('Module', [('Expr', (1, 0, 1, 12), ('Set', (1, 0, 1, 12), [('Starred', (1, 1, 1, 8), ('Set', (1, 2, 1, 8), [('Constant', (1, 3, 1, 4), 1, None), ('Constant', (1, 6, 1, 7), 2, None)]), ('Load',)), ('Constant', (1, 10, 1, 11), 3, None)]))], []),
('Module', [('AsyncFunctionDef', (1, 0, 2, 21), 'f', ('arguments', [], [], None, [], [], None, []), [('Expr', (2, 1, 2, 21), ('ListComp', (2, 1, 2, 21), ('Name', (2, 2, 2, 3), 'i', ('Load',)), [('comprehension', ('Name', (2, 14, 2, 15), 'b', ('Store',)), ('Name', (2, 19, 2, 20), 'c', ('Load',)), [], 1)]))], [], None, None)], []),
('Module', [('FunctionDef', (4, 0, 4, 13), 'f', ('arguments', [], [], None, [], [], None, []), [('Pass', (4, 9, 4, 13))], [('Name', (1, 1, 1, 6), 'deco1', ('Load',)), ('Call', (2, 1, 2, 8), ('Name', (2, 1, 2, 6), 'deco2', ('Load',)), [], []), ('Call', (3, 1, 3, 9), ('Name', (3, 1, 3, 6), 'deco3', ('Load',)), [('Constant', (3, 7, 3, 8), 1, None)], [])], None, None)], []),
('Module', [('AsyncFunctionDef', (4, 0, 4, 19), 'f', ('arguments', [], [], None, [], [], None, []), [('Pass', (4, 15, 4, 19))], [('Name', (1, 1, 1, 6), 'deco1', ('Load',)), ('Call', (2, 1, 2, 8), ('Name', (2, 1, 2, 6), 'deco2', ('Load',)), [], []), ('Call', (3, 1, 3, 9), ('Name', (3, 1, 3, 6), 'deco3', ('Load',)), [('Constant', (3, 7, 3, 8), 1, None)], [])], None, None)], []),
('Module', [('ClassDef', (4, 0, 4, 13), 'C', [], [], [('Pass', (4, 9, 4, 13))], [('Name', (1, 1, 1, 6), 'deco1', ('Load',)), ('Call', (2, 1, 2, 8), ('Name', (2, 1, 2, 6), 'deco2', ('Load',)), [], []), ('Call', (3, 1, 3, 9), ('Name', (3, 1, 3, 6), 'deco3', ('Load',)), [('Constant', (3, 7, 3, 8), 1, None)], [])])], []),
('Module', [('FunctionDef', (2, 0, 2, 13), 'f', ('arguments', [], [], None, [], [], None, []), [('Pass', (2, 9, 2, 13))], [('Call', (1, 1, 1, 19), ('Name', (1, 1, 1, 5), 'deco', ('Load',)), [('GeneratorExp', (1, 5, 1, 19), ('Name', (1, 6, 1, 7), 'a', ('Load',)), [('comprehension', ('Name', (1, 12, 1, 13), 'a', ('Store',)), ('Name', (1, 17, 1, 18), 'b', ('Load',)), [], 0)])], [])], None, None)], []),
('Module', [('FunctionDef', (2, 0, 2, 13), 'f', ('arguments', [], [], None, [], [], None, []), [('Pass', (2, 9, 2, 13))], [('Attribute', (1, 1, 1, 6), ('Attribute', (1, 1, 1, 4), ('Name', (1, 1, 1, 2), 'a', ('Load',)), 'b', ('Load',)), 'c', ('Load',))], None, None)], []),
('Module', [('Expr', (1, 0, 1, 8), ('NamedExpr', (1, 1, 1, 7), ('Name', (1, 1, 1, 2), 'a', ('Store',)), ('Constant', (1, 6, 1, 7), 1, None)))], []),
('Module', [('FunctionDef', (1, 0, 1, 18), 'f', ('arguments', [('arg', (1, 6, 1, 7), 'a', None, None)], [], None, [], [], None, []), [('Pass', (1, 14, 1, 18))], [], None, None)], []),
('Module', [('FunctionDef', (1, 0, 1, 26), 'f', ('arguments', [('arg', (1, 6, 1, 7), 'a', None, None)], [('arg', (1, 12, 1, 13), 'c', None, None), ('arg', (1, 15, 1, 16), 'd', None, None), ('arg', (1, 18, 1, 19), 'e', None, None)], None, [], [], None, []), [('Pass', (1, 22, 1, 26))], [], None, None)], []),
('Module', [('FunctionDef', (1, 0, 1, 29), 'f', ('arguments', [('arg', (1, 6, 1, 7), 'a', None, None)], [('arg', (1, 12, 1, 13), 'c', None, None)], None, [('arg', (1, 18, 1, 19), 'd', None, None), ('arg', (1, 21, 1, 22), 'e', None, None)], [None, None], None, []), [('Pass', (1, 25, 1, 29))], [], None, None)], []),
('Module', [('FunctionDef', (1, 0, 1, 39), 'f', ('arguments', [('arg', (1, 6, 1, 7), 'a', None, None)], [('arg', (1, 12, 1, 13), 'c', None, None)], None, [('arg', (1, 18, 1, 19), 'd', None, None), ('arg', (1, 21, 1, 22), 'e', None, None)], [None, None], ('arg', (1, 26, 1, 32), 'kwargs', None, None), []), [('Pass', (1, 35, 1, 39))], [], None, None)], []),
('Module', [('FunctionDef', (1, 0, 1, 20), 'f', ('arguments', [('arg', (1, 6, 1, 7), 'a', None, None)], [], None, [], [], None, [('Constant', (1, 8, 1, 9), 1, None)]), [('Pass', (1, 16, 1, 20))], [], None, None)], []),
('Module', [('FunctionDef', (1, 0, 1, 29), 'f', ('arguments', [('arg', (1, 6, 1, 7), 'a', None, None)], [('arg', (1, 14, 1, 15), 'b', None, None), ('arg', (1, 19, 1, 20), 'c', None, None)], None, [], [], None, [('Constant', (1, 8, 1, 9), 1, None), ('Constant', (1, 16, 1, 17), 2, None), ('Constant', (1, 21, 1, 22), 4, None)]), [('Pass', (1, 25, 1, 29))], [], None, None)], []),
('Module', [('FunctionDef', (1, 0, 1, 32), 'f', ('arguments', [('arg', (1, 6, 1, 7), 'a', None, None)], [('arg', (1, 14, 1, 15), 'b', None, None)], None, [('arg', (1, 22, 1, 23), 'c', None, None)], [('Constant', (1, 24, 1, 25), 4, None)], None, [('Constant', (1, 8, 1, 9), 1, None), ('Constant', (1, 16, 1, 17), 2, None)]), [('Pass', (1, 28, 1, 32))], [], None, None)], []),
('Module', [('FunctionDef', (1, 0, 1, 30), 'f', ('arguments', [('arg', (1, 6, 1, 7), 'a', None, None)], [('arg', (1, 14, 1, 15), 'b', None, None)], None, [('arg', (1, 22, 1, 23), 'c', None, None)], [None], None, [('Constant', (1, 8, 1, 9), 1, None), ('Constant', (1, 16, 1, 17), 2, None)]), [('Pass', (1, 26, 1, 30))], [], None, None)], []),
('Module', [('FunctionDef', (1, 0, 1, 42), 'f', ('arguments', [('arg', (1, 6, 1, 7), 'a', None, None)], [('arg', (1, 14, 1, 15), 'b', None, None)], None, [('arg', (1, 22, 1, 23), 'c', None, None)], [('Constant', (1, 24, 1, 25), 4, None)], ('arg', (1, 29, 1, 35), 'kwargs', None, None), [('Constant', (1, 8, 1, 9), 1, None), ('Constant', (1, 16, 1, 17), 2, None)]), [('Pass', (1, 38, 1, 42))], [], None, None)], []),
('Module', [('FunctionDef', (1, 0, 1, 40), 'f', ('arguments', [('arg', (1, 6, 1, 7), 'a', None, None)], [('arg', (1, 14, 1, 15), 'b', None, None)], None, [('arg', (1, 22, 1, 23), 'c', None, None)], [None], ('arg', (1, 27, 1, 33), 'kwargs', None, None), [('Constant', (1, 8, 1, 9), 1, None), ('Constant', (1, 16, 1, 17), 2, None)]), [('Pass', (1, 36, 1, 40))], [], None, None)], []),
]
single_results = [
('Interactive', [('Expr', (1, 0, 1, 3), ('BinOp', (1, 0, 1, 3), ('Constant', (1, 0, 1, 1), 1, None), ('Add',), ('Constant', (1, 2, 1, 3), 2, None)))]),
]
eval_results = [
('Expression', ('Constant', (1, 0, 1, 4), None, None)),
('Expression', ('BoolOp', (1, 0, 1, 7), ('And',), [('Name', (1, 0, 1, 1), 'a', ('Load',)), ('Name', (1, 6, 1, 7), 'b', ('Load',))])),
('Expression', ('BinOp', (1, 0, 1, 5), ('Name', (1, 0, 1, 1), 'a', ('Load',)), ('Add',), ('Name', (1, 4, 1, 5), 'b', ('Load',)))),
('Expression', ('UnaryOp', (1, 0, 1, 5), ('Not',), ('Name', (1, 4, 1, 5), 'v', ('Load',)))),
('Expression', ('Lambda', (1, 0, 1, 11), ('arguments', [], [], None, [], [], None, []), ('Constant', (1, 7, 1, 11), None, None))),
('Expression', ('Dict', (1, 0, 1, 7), [('Constant', (1, 2, 1, 3), 1, None)], [('Constant', (1, 4, 1, 5), 2, None)])),
('Expression', ('Dict', (1, 0, 1, 2), [], [])),
('Expression', ('Set', (1, 0, 1, 7), [('Constant', (1, 1, 1, 5), None, None)])),
('Expression', ('Dict', (1, 0, 5, 6), [('Constant', (2, 6, 2, 7), 1, None)], [('Constant', (4, 10, 4, 11), 2, None)])),
('Expression', ('ListComp', (1, 0, 1, 19), ('Name', (1, 1, 1, 2), 'a', ('Load',)), [('comprehension', ('Name', (1, 7, 1, 8), 'b', ('Store',)), ('Name', (1, 12, 1, 13), 'c', ('Load',)), [('Name', (1, 17, 1, 18), 'd', ('Load',))], 0)])),
('Expression', ('GeneratorExp', (1, 0, 1, 19), ('Name', (1, 1, 1, 2), 'a', ('Load',)), [('comprehension', ('Name', (1, 7, 1, 8), 'b', ('Store',)), ('Name', (1, 12, 1, 13), 'c', ('Load',)), [('Name', (1, 17, 1, 18), 'd', ('Load',))], 0)])),
('Expression', ('ListComp', (1, 0, 1, 20), ('Tuple', (1, 1, 1, 6), [('Name', (1, 2, 1, 3), 'a', ('Load',)), ('Name', (1, 4, 1, 5), 'b', ('Load',))], ('Load',)), [('comprehension', ('Tuple', (1, 11, 1, 14), [('Name', (1, 11, 1, 12), 'a', ('Store',)), ('Name', (1, 13, 1, 14), 'b', ('Store',))], ('Store',)), ('Name', (1, 18, 1, 19), 'c', ('Load',)), [], 0)])),
('Expression', ('ListComp', (1, 0, 1, 22), ('Tuple', (1, 1, 1, 6), [('Name', (1, 2, 1, 3), 'a', ('Load',)), ('Name', (1, 4, 1, 5), 'b', ('Load',))], ('Load',)), [('comprehension', ('Tuple', (1, 11, 1, 16), [('Name', (1, 12, 1, 13), 'a', ('Store',)), ('Name', (1, 14, 1, 15), 'b', ('Store',))], ('Store',)), ('Name', (1, 20, 1, 21), 'c', ('Load',)), [], 0)])),
('Expression', ('ListComp', (1, 0, 1, 22), ('Tuple', (1, 1, 1, 6), [('Name', (1, 2, 1, 3), 'a', ('Load',)), ('Name', (1, 4, 1, 5), 'b', ('Load',))], ('Load',)), [('comprehension', ('List', (1, 11, 1, 16), [('Name', (1, 12, 1, 13), 'a', ('Store',)), ('Name', (1, 14, 1, 15), 'b', ('Store',))], ('Store',)), ('Name', (1, 20, 1, 21), 'c', ('Load',)), [], 0)])),
('Expression', ('SetComp', (1, 0, 1, 20), ('Tuple', (1, 1, 1, 6), [('Name', (1, 2, 1, 3), 'a', ('Load',)), ('Name', (1, 4, 1, 5), 'b', ('Load',))], ('Load',)), [('comprehension', ('Tuple', (1, 11, 1, 14), [('Name', (1, 11, 1, 12), 'a', ('Store',)), ('Name', (1, 13, 1, 14), 'b', ('Store',))], ('Store',)), ('Name', (1, 18, 1, 19), 'c', ('Load',)), [], 0)])),
('Expression', ('SetComp', (1, 0, 1, 22), ('Tuple', (1, 1, 1, 6), [('Name', (1, 2, 1, 3), 'a', ('Load',)), ('Name', (1, 4, 1, 5), 'b', ('Load',))], ('Load',)), [('comprehension', ('Tuple', (1, 11, 1, 16), [('Name', (1, 12, 1, 13), 'a', ('Store',)), ('Name', (1, 14, 1, 15), 'b', ('Store',))], ('Store',)), ('Name', (1, 20, 1, 21), 'c', ('Load',)), [], 0)])),
('Expression', ('SetComp', (1, 0, 1, 22), ('Tuple', (1, 1, 1, 6), [('Name', (1, 2, 1, 3), 'a', ('Load',)), ('Name', (1, 4, 1, 5), 'b', ('Load',))], ('Load',)), [('comprehension', ('List', (1, 11, 1, 16), [('Name', (1, 12, 1, 13), 'a', ('Store',)), ('Name', (1, 14, 1, 15), 'b', ('Store',))], ('Store',)), ('Name', (1, 20, 1, 21), 'c', ('Load',)), [], 0)])),
('Expression', ('GeneratorExp', (1, 0, 1, 20), ('Tuple', (1, 1, 1, 6), [('Name', (1, 2, 1, 3), 'a', ('Load',)), ('Name', (1, 4, 1, 5), 'b', ('Load',))], ('Load',)), [('comprehension', ('Tuple', (1, 11, 1, 14), [('Name', (1, 11, 1, 12), 'a', ('Store',)), ('Name', (1, 13, 1, 14), 'b', ('Store',))], ('Store',)), ('Name', (1, 18, 1, 19), 'c', ('Load',)), [], 0)])),
('Expression', ('GeneratorExp', (1, 0, 1, 22), ('Tuple', (1, 1, 1, 6), [('Name', (1, 2, 1, 3), 'a', ('Load',)), ('Name', (1, 4, 1, 5), 'b', ('Load',))], ('Load',)), [('comprehension', ('Tuple', (1, 11, 1, 16), [('Name', (1, 12, 1, 13), 'a', ('Store',)), ('Name', (1, 14, 1, 15), 'b', ('Store',))], ('Store',)), ('Name', (1, 20, 1, 21), 'c', ('Load',)), [], 0)])),
('Expression', ('GeneratorExp', (1, 0, 1, 22), ('Tuple', (1, 1, 1, 6), [('Name', (1, 2, 1, 3), 'a', ('Load',)), ('Name', (1, 4, 1, 5), 'b', ('Load',))], ('Load',)), [('comprehension', ('List', (1, 11, 1, 16), [('Name', (1, 12, 1, 13), 'a', ('Store',)), ('Name', (1, 14, 1, 15), 'b', ('Store',))], ('Store',)), ('Name', (1, 20, 1, 21), 'c', ('Load',)), [], 0)])),
('Expression', ('Compare', (1, 0, 1, 9), ('Constant', (1, 0, 1, 1), 1, None), [('Lt',), ('Lt',)], [('Constant', (1, 4, 1, 5), 2, None), ('Constant', (1, 8, 1, 9), 3, None)])),
('Expression', ('Call', (1, 0, 1, 17), ('Name', (1, 0, 1, 1), 'f', ('Load',)), [('Constant', (1, 2, 1, 3), 1, None), ('Constant', (1, 4, 1, 5), 2, None), ('Starred', (1, 10, 1, 12), ('Name', (1, 11, 1, 12), 'd', ('Load',)), ('Load',))], [('keyword', (1, 6, 1, 9), 'c', ('Constant', (1, 8, 1, 9), 3, None)), ('keyword', (1, 13, 1, 16), None, ('Name', (1, 15, 1, 16), 'e', ('Load',)))])),
('Expression', ('Call', (1, 0, 1, 10), ('Name', (1, 0, 1, 1), 'f', ('Load',)), [('Starred', (1, 2, 1, 9), ('List', (1, 3, 1, 9), [('Constant', (1, 4, 1, 5), 0, None), ('Constant', (1, 7, 1, 8), 1, None)], ('Load',)), ('Load',))], [])),
('Expression', ('Call', (1, 0, 1, 15), ('Name', (1, 0, 1, 1), 'f', ('Load',)), [('GeneratorExp', (1, 1, 1, 15), ('Name', (1, 2, 1, 3), 'a', ('Load',)), [('comprehension', ('Name', (1, 8, 1, 9), 'a', ('Store',)), ('Name', (1, 13, 1, 14), 'b', ('Load',)), [], 0)])], [])),
('Expression', ('Constant', (1, 0, 1, 2), 10, None)),
('Expression', ('Constant', (1, 0, 1, 8), 'string', None)),
('Expression', ('Attribute', (1, 0, 1, 3), ('Name', (1, 0, 1, 1), 'a', ('Load',)), 'b', ('Load',))),
('Expression', ('Subscript', (1, 0, 1, 6), ('Name', (1, 0, 1, 1), 'a', ('Load',)), ('Slice', (1, 2, 1, 5), ('Name', (1, 2, 1, 3), 'b', ('Load',)), ('Name', (1, 4, 1, 5), 'c', ('Load',)), None), ('Load',))),
('Expression', ('Name', (1, 0, 1, 1), 'v', ('Load',))),
('Expression', ('List', (1, 0, 1, 7), [('Constant', (1, 1, 1, 2), 1, None), ('Constant', (1, 3, 1, 4), 2, None), ('Constant', (1, 5, 1, 6), 3, None)], ('Load',))),
('Expression', ('List', (1, 0, 1, 2), [], ('Load',))),
('Expression', ('Tuple', (1, 0, 1, 5), [('Constant', (1, 0, 1, 1), 1, None), ('Constant', (1, 2, 1, 3), 2, None), ('Constant', (1, 4, 1, 5), 3, None)], ('Load',))),
('Expression', ('Tuple', (1, 0, 1, 7), [('Constant', (1, 1, 1, 2), 1, None), ('Constant', (1, 3, 1, 4), 2, None), ('Constant', (1, 5, 1, 6), 3, None)], ('Load',))),
('Expression', ('Tuple', (1, 0, 1, 2), [], ('Load',))),
('Expression', ('Call', (1, 0, 1, 17), ('Attribute', (1, 0, 1, 7), ('Attribute', (1, 0, 1, 5), ('Attribute', (1, 0, 1, 3), ('Name', (1, 0, 1, 1), 'a', ('Load',)), 'b', ('Load',)), 'c', ('Load',)), 'd', ('Load',)), [('Subscript', (1, 8, 1, 16), ('Attribute', (1, 8, 1, 11), ('Name', (1, 8, 1, 9), 'a', ('Load',)), 'b', ('Load',)), ('Slice', (1, 12, 1, 15), ('Constant', (1, 12, 1, 13), 1, None), ('Constant', (1, 14, 1, 15), 2, None), None), ('Load',))], [])),
]
main()
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