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Merged revisions 66805,66841,66860,66884-66886,66893,66907,66910 via svnmerge from 

svn+ssh://pythondev@svn.python.org/sandbox/trunk/2to3/lib2to3

........
  r66805 | benjamin.peterson | 2008-10-04 20:11:02 -0500 (Sat, 04 Oct 2008) | 1 line

  mention what the fixes directory is for
........
  r66841 | benjamin.peterson | 2008-10-07 17:48:12 -0500 (Tue, 07 Oct 2008) | 1 line

  use assertFalse and assertTrue
........
  r66860 | benjamin.peterson | 2008-10-08 16:05:07 -0500 (Wed, 08 Oct 2008) | 1 line

  instead of abusing the pattern matcher, use start_tree to find a next binding
........
  r66884 | benjamin.peterson | 2008-10-13 15:50:30 -0500 (Mon, 13 Oct 2008) | 1 line

  don't print tokens to stdout when -v is given
........
  r66885 | benjamin.peterson | 2008-10-13 16:28:57 -0500 (Mon, 13 Oct 2008) | 1 line

  add the -x option to disable fixers
........
  r66886 | benjamin.peterson | 2008-10-13 16:33:53 -0500 (Mon, 13 Oct 2008) | 1 line

  cut down on some crud
........
  r66893 | benjamin.peterson | 2008-10-14 17:16:54 -0500 (Tue, 14 Oct 2008) | 1 line

  add an optional set literal fixer
........
  r66907 | benjamin.peterson | 2008-10-15 16:59:41 -0500 (Wed, 15 Oct 2008) | 1 line

  don't write backup files by default
........
  r66910 | benjamin.peterson | 2008-10-15 17:43:10 -0500 (Wed, 15 Oct 2008) | 1 line

  add the -n option; it stops backupfiles from being written
........
This commit is contained in:
Benjamin Peterson 2008-10-15 23:10:28 +00:00
parent 1fb84519b1
commit 6ae94ee299
8 changed files with 248 additions and 53 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
Lib/lib2to3/fixes/fix_next.py
View File

@ -28,15 +28,19 @@ class FixNext(fixer_base.BaseFix):
any* > >
|
global=global_stmt< 'global' any* 'next' any* >
|
mod=file_input< any+ >
"""
order = "pre" # Pre-order tree traversal
def start_tree(self, tree, filename):
super(FixNext, self).start_tree(tree, filename)
self.shadowed_next = False
n = find_binding('next', tree)
if n:
self.warning(n, bind_warning)
self.shadowed_next = True
else:
self.shadowed_next = False
def transform(self, node, results):
assert results
@ -69,11 +73,6 @@ class FixNext(fixer_base.BaseFix):
elif "global" in results:
self.warning(node, bind_warning)
self.shadowed_next = True
elif mod:
n = find_binding('next', mod)
if n:
self.warning(n, bind_warning)
self.shadowed_next = True
### The following functions help test if node is part of an assignment

52
Lib/lib2to3/fixes/fix_set_literal.py Normal file
View File

@ -0,0 +1,52 @@
"""
Optional fixer to transform set() calls to set literals.
"""
# Author: Benjamin Peterson
from lib2to3 import fixer_base, pytree
from lib2to3.fixer_util import token, syms
class FixSetLiteral(fixer_base.BaseFix):
explicit = True
PATTERN = """power< 'set' trailer< '('
(atom=atom< '[' (items=listmaker< any ((',' any)* [',']) >
|
single=any) ']' >
|
atom< '(' items=testlist_gexp< any ((',' any)* [',']) > ')' >
)
')' > >
"""
def transform(self, node, results):
single = results.get("single")
if single:
# Make a fake listmaker
fake = pytree.Node(syms.listmaker, [single.clone()])
single.replace(fake)
items = fake
else:
items = results["items"]
# Build the contents of the literal
literal = [pytree.Leaf(token.LBRACE, "{")]
literal.extend(n.clone() for n in items.children)
literal.append(pytree.Leaf(token.RBRACE, "}"))
# Set the prefix of the right brace to that of the ')' or ']'
literal[-1].set_prefix(items.get_next_sibling().get_prefix())
maker = pytree.Node(syms.dictsetmaker, literal)
maker.set_prefix(node.get_prefix())
# If the original was a one tuple, we need to remove the extra comma.
if len(maker.children) == 4:
n = maker.children[2]
n.remove()
maker.children[-1].set_prefix(n.get_prefix())
# Finally, replace the set call with our shiny new literal.
return maker

50
Lib/lib2to3/main.py
View File

@ -15,10 +15,31 @@ class StdoutRefactoringTool(refactor.RefactoringTool):
Prints output to stdout.
"""
def __init__(self, fixers, options, explicit, nobackups):
self.nobackups = nobackups
super(StdoutRefactoringTool, self).__init__(fixers, options, explicit)
def log_error(self, msg, *args, **kwargs):
self.errors.append((msg, args, kwargs))
self.logger.error(msg, *args, **kwargs)
def write_file(self, new_text, filename, old_text):
if not self.nobackups:
# Make backup
backup = filename + ".bak"
if os.path.lexists(backup):
try:
os.remove(backup)
except os.error, err:
self.log_message("Can't remove backup %s", backup)
try:
os.rename(filename, backup)
except os.error, err:
self.log_message("Can't rename %s to %s", filename, backup)
# Actually write the new file
super(StdoutRefactoringTool, self).write_file(new_text,
filename, old_text)
def print_output(self, lines):
for line in lines:
print line
@ -39,7 +60,9 @@ def main(fixer_pkg, args=None):
parser.add_option("-d", "--doctests_only", action="store_true",
help="Fix up doctests only")
parser.add_option("-f", "--fix", action="append", default=[],
help="Each FIX specifies a transformation; default all")
help="Each FIX specifies a transformation; default: all")
parser.add_option("-x", "--nofix", action="append", default=[],
help="Prevent a fixer from being run.")
parser.add_option("-l", "--list-fixes", action="store_true",
help="List available transformations (fixes/fix_*.py)")
parser.add_option("-p", "--print-function", action="store_true",
@ -48,10 +71,14 @@ def main(fixer_pkg, args=None):
help="More verbose logging")
parser.add_option("-w", "--write", action="store_true",
help="Write back modified files")
parser.add_option("-n", "--nobackups", action="store_true", default=False,
help="Don't write backups for modified files.")
# Parse command line arguments
refactor_stdin = False
options, args = parser.parse_args(args)
if not options.write and options.nobackups:
parser.error("Can't use -n without -w")
if options.list_fixes:
print "Available transformations for the -f/--fix option:"
for fixname in refactor.get_all_fix_names(fixer_pkg):
@ -74,15 +101,22 @@ def main(fixer_pkg, args=None):
# Initialize the refactoring tool
rt_opts = {"print_function" : options.print_function}
avail_names = refactor.get_fixers_from_package(fixer_pkg)
explicit = []
avail_fixes = set(refactor.get_fixers_from_package(fixer_pkg))
unwanted_fixes = set(fixer_pkg + ".fix_" + fix for fix in options.nofix)
explicit = set()
if options.fix:
explicit = [fixer_pkg + ".fix_" + fix
for fix in options.fix if fix != "all"]
fixer_names = avail_names if "all" in options.fix else explicit
all_present = False
for fix in options.fix:
if fix == "all":
all_present = True
else:
explicit.add(fixer_pkg + ".fix_" + fix)
requested = avail_fixes.union(explicit) if all_present else explicit
else:
fixer_names = avail_names
rt = StdoutRefactoringTool(fixer_names, rt_opts, explicit=explicit)
requested = avail_fixes.union(explicit)
fixer_names = requested.difference(unwanted_fixes)
rt = StdoutRefactoringTool(sorted(fixer_names), rt_opts, sorted(explicit),
options.nobackups)
# Refactor all files and directories passed as arguments
if not rt.errors:

18
Lib/lib2to3/refactor.py
View File

@ -36,9 +36,7 @@ def get_all_fix_names(fixer_pkg, remove_prefix=True):
pkg = __import__(fixer_pkg, [], [], ["*"])
fixer_dir = os.path.dirname(pkg.__file__)
fix_names = []
names = os.listdir(fixer_dir)
names.sort()
for name in names:
for name in sorted(os.listdir(fixer_dir)):
if name.startswith("fix_") and name.endswith(".py"):
if remove_prefix:
name = name[4:]
@ -253,7 +251,7 @@ class RefactoringTool(object):
there were errors during the parse.
"""
try:
tree = self.driver.parse_string(data,1)
tree = self.driver.parse_string(data)
except Exception, err:
self.log_error("Can't parse %s: %s: %s",
name, err.__class__.__name__, err)
@ -352,23 +350,13 @@ class RefactoringTool(object):
else:
self.log_debug("Not writing changes to %s", filename)
def write_file(self, new_text, filename, old_text=None):
def write_file(self, new_text, filename, old_text):
"""Writes a string to a file.
It first shows a unified diff between the old text and the new text, and
then rewrites the file; the latter is only done if the write option is
set.
"""
backup = filename + ".bak"
if os.path.lexists(backup):
try:
os.remove(backup)
except os.error, err:
self.log_message("Can't remove backup %s", backup)
try:
os.rename(filename, backup)
except os.error, err:
self.log_message("Can't rename %s to %s", filename, backup)
try:
f = open(filename, "w")
except os.error, err:

3
Lib/lib2to3/tests/data/README
View File

@ -1,5 +1,6 @@
Files in this directory:
In this directory:
- py2_test_grammar.py -- test file that exercises most/all of Python 2.x's grammar.
- py3_test_grammar.py -- test file that exercises most/all of Python 3.x's grammar.
- infinite_recursion.py -- test file that causes lib2to3's faster recursive pattern matching
scheme to fail, but passes when lib2to3 falls back to iterative pattern matching.
- fixes/ -- for use by test_refactor.py

128
Lib/lib2to3/tests/test_fixers.py
View File

@ -3385,6 +3385,134 @@ class Test_import(FixerTestCase):
"""
self.check_both(b, a)
class Test_set_literal(FixerTestCase):
fixer = "set_literal"
def test_basic(self):
b = """set([1, 2, 3])"""
a = """{1, 2, 3}"""
self.check(b, a)
b = """set((1, 2, 3))"""
a = """{1, 2, 3}"""
self.check(b, a)
b = """set((1,))"""
a = """{1}"""
self.check(b, a)
b = """set([1])"""
self.check(b, a)
b = """set((a, b))"""
a = """{a, b}"""
self.check(b, a)
b = """set([a, b])"""
self.check(b, a)
b = """set((a*234, f(args=23)))"""
a = """{a*234, f(args=23)}"""
self.check(b, a)
b = """set([a*23, f(23)])"""
a = """{a*23, f(23)}"""
self.check(b, a)
b = """set([a-234**23])"""
a = """{a-234**23}"""
self.check(b, a)
def test_listcomps(self):
b = """set([x for x in y])"""
a = """{x for x in y}"""
self.check(b, a)
b = """set([x for x in y if x == m])"""
a = """{x for x in y if x == m}"""
self.check(b, a)
b = """set([x for x in y for a in b])"""
a = """{x for x in y for a in b}"""
self.check(b, a)
b = """set([f(x) - 23 for x in y])"""
a = """{f(x) - 23 for x in y}"""
self.check(b, a)
def test_whitespace(self):
b = """set( [1, 2])"""
a = """{1, 2}"""
self.check(b, a)
b = """set([1 , 2])"""
a = """{1 , 2}"""
self.check(b, a)
b = """set([ 1 ])"""
a = """{ 1 }"""
self.check(b, a)
b = """set( [1] )"""
a = """{1}"""
self.check(b, a)
b = """set([ 1, 2 ])"""
a = """{ 1, 2 }"""
self.check(b, a)
b = """set([x for x in y ])"""
a = """{x for x in y }"""
self.check(b, a)
b = """set(
[1, 2]
)
"""
a = """{1, 2}\n"""
self.check(b, a)
def test_comments(self):
b = """set((1, 2)) # Hi"""
a = """{1, 2} # Hi"""
self.check(b, a)
# This isn't optimal behavior, but the fixer is optional.
b = """
# Foo
set( # Bar
(1, 2)
)
"""
a = """
# Foo
{1, 2}
"""
self.check(b, a)
def test_unchanged(self):
s = """set()"""
self.unchanged(s)
s = """set(a)"""
self.unchanged(s)
s = """set(a, b, c)"""
self.unchanged(s)
# Don't transform generators because they might have to be lazy.
s = """set(x for x in y)"""
self.unchanged(s)
s = """set(x for x in y if z)"""
self.unchanged(s)
s = """set(a*823-23**2 + f(23))"""
self.unchanged(s)
class Test_sys_exc(FixerTestCase):
fixer = "sys_exc"

28
Lib/lib2to3/tests/test_pytree.py
View File

@ -353,29 +353,29 @@ class TestPatterns(support.TestCase):
# Build a pattern matching a leaf
pl = pytree.LeafPattern(100, "foo", name="pl")
r = {}
self.assertEqual(pl.match(root, results=r), False)
self.assertFalse(pl.match(root, results=r))
self.assertEqual(r, {})
self.assertEqual(pl.match(n1, results=r), False)
self.assertFalse(pl.match(n1, results=r))
self.assertEqual(r, {})
self.assertEqual(pl.match(n2, results=r), False)
self.assertFalse(pl.match(n2, results=r))
self.assertEqual(r, {})
self.assertEqual(pl.match(l1, results=r), True)
self.assertTrue(pl.match(l1, results=r))
self.assertEqual(r, {"pl": l1})
r = {}
self.assertEqual(pl.match(l2, results=r), False)
self.assertFalse(pl.match(l2, results=r))
self.assertEqual(r, {})
# Build a pattern matching a node
pn = pytree.NodePattern(1000, [pl], name="pn")
self.assertEqual(pn.match(root, results=r), False)
self.assertFalse(pn.match(root, results=r))
self.assertEqual(r, {})
self.assertEqual(pn.match(n1, results=r), False)
self.assertFalse(pn.match(n1, results=r))
self.assertEqual(r, {})
self.assertEqual(pn.match(n2, results=r), True)
self.assertTrue(pn.match(n2, results=r))
self.assertEqual(r, {"pn": n2, "pl": l3})
r = {}
self.assertEqual(pn.match(l1, results=r), False)
self.assertFalse(pn.match(l1, results=r))
self.assertEqual(r, {})
self.assertEqual(pn.match(l2, results=r), False)
self.assertFalse(pn.match(l2, results=r))
self.assertEqual(r, {})
def testWildcardPatterns(self):
@ -391,11 +391,11 @@ class TestPatterns(support.TestCase):
pn = pytree.NodePattern(1000, [pl], name="pn")
pw = pytree.WildcardPattern([[pn], [pl, pl]], name="pw")
r = {}
self.assertEqual(pw.match_seq([root], r), False)
self.assertFalse(pw.match_seq([root], r))
self.assertEqual(r, {})
self.assertEqual(pw.match_seq([n1], r), False)
self.assertFalse(pw.match_seq([n1], r))
self.assertEqual(r, {})
self.assertEqual(pw.match_seq([n2], r), True)
self.assertTrue(pw.match_seq([n2], r))
# These are easier to debug
self.assertEqual(sorted(r.keys()), ["pl", "pn", "pw"])
self.assertEqual(r["pl"], l1)
@ -404,7 +404,7 @@ class TestPatterns(support.TestCase):
# But this is equivalent
self.assertEqual(r, {"pl": l1, "pn": n2, "pw": [n2]})
r = {}
self.assertEqual(pw.match_seq([l1, l3], r), True)
self.assertTrue(pw.match_seq([l1, l3], r))
self.assertEqual(r, {"pl": l3, "pw": [l1, l3]})
self.assert_(r["pl"] is l3)
r = {}

7
Lib/lib2to3/tests/test_refactor.py
View File

@ -123,7 +123,6 @@ class TestRefactoringTool(unittest.TestCase):
def test_refactor_file(self):
test_file = os.path.join(FIXER_DIR, "parrot_example.py")
backup = test_file + ".bak"
old_contents = open(test_file, "r").read()
rt = self.rt()
@ -133,14 +132,8 @@ class TestRefactoringTool(unittest.TestCase):
rt.refactor_file(test_file, True)
try:
self.assertNotEqual(old_contents, open(test_file, "r").read())
self.assertTrue(os.path.exists(backup))
self.assertEqual(old_contents, open(backup, "r").read())
finally:
open(test_file, "w").write(old_contents)
try:
os.unlink(backup)
except OSError:
pass
def test_refactor_docstring(self):
rt = self.rt()