82 lines
2.7 KiB
Python
82 lines
2.7 KiB
Python
# Copyright 2006 Google, Inc. All Rights Reserved.
|
|
# Licensed to PSF under a Contributor Agreement.
|
|
|
|
"""Fixer for print.
|
|
|
|
Change:
|
|
'print' into 'print()'
|
|
'print ...' into 'print(...)'
|
|
'print ... ,' into 'print(..., end=" ")'
|
|
'print >>x, ...' into 'print(..., file=x)'
|
|
"""
|
|
|
|
# Local imports
|
|
from .. import patcomp
|
|
from .. import pytree
|
|
from ..pgen2 import token
|
|
from .import basefix
|
|
from .util import Name, Call, Comma, String, is_tuple
|
|
|
|
|
|
parend_expr = patcomp.compile_pattern(
|
|
"""atom< '(' [atom|STRING|NAME] ')' >"""
|
|
)
|
|
|
|
|
|
class FixPrint(basefix.BaseFix):
|
|
|
|
PATTERN = """
|
|
simple_stmt< bare='print' any > | print_stmt
|
|
"""
|
|
|
|
def transform(self, node, results):
|
|
assert results
|
|
bare_print = results.get("bare")
|
|
|
|
if bare_print:
|
|
# Special-case print all by itself
|
|
bare_print.replace(Call(Name("print"), [],
|
|
prefix=bare_print.get_prefix()))
|
|
return
|
|
assert node.children[0] == Name("print")
|
|
args = node.children[1:]
|
|
if len(args) == 1 and parend_expr.match(args[0]):
|
|
# We don't want to keep sticking parens around an
|
|
# already-parenthesised expression.
|
|
return
|
|
|
|
sep = end = file = None
|
|
if args and args[-1] == Comma():
|
|
args = args[:-1]
|
|
end = " "
|
|
if args and args[0] == pytree.Leaf(token.RIGHTSHIFT, ">>"):
|
|
assert len(args) >= 2
|
|
file = args[1].clone()
|
|
args = args[3:] # Strip a possible comma after the file expression
|
|
# Now synthesize a print(args, sep=..., end=..., file=...) node.
|
|
l_args = [arg.clone() for arg in args]
|
|
if l_args:
|
|
l_args[0].set_prefix("")
|
|
if sep is not None or end is not None or file is not None:
|
|
if sep is not None:
|
|
self.add_kwarg(l_args, "sep", String(repr(sep)))
|
|
if end is not None:
|
|
self.add_kwarg(l_args, "end", String(repr(end)))
|
|
if file is not None:
|
|
self.add_kwarg(l_args, "file", file)
|
|
n_stmt = Call(Name("print"), l_args)
|
|
n_stmt.set_prefix(node.get_prefix())
|
|
return n_stmt
|
|
|
|
def add_kwarg(self, l_nodes, s_kwd, n_expr):
|
|
# XXX All this prefix-setting may lose comments (though rarely)
|
|
n_expr.set_prefix("")
|
|
n_argument = pytree.Node(self.syms.argument,
|
|
(Name(s_kwd),
|
|
pytree.Leaf(token.EQUAL, "="),
|
|
n_expr))
|
|
if l_nodes:
|
|
l_nodes.append(Comma())
|
|
n_argument.set_prefix(" ")
|
|
l_nodes.append(n_argument)
|