cpython/Lib/lib2to3/fixes/fix_print.py
Benjamin Peterson 3059b00f65 Merged revisions 74114 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

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  r74114 | benjamin.peterson | 2009-07-20 10:33:09 -0500 (Mon, 20 Jul 2009) | 110 lines

  Merged revisions 73771,73811,73840,73842,73848-73849,73861,73957-73960,73964-73969,73972-73974,73977,73981,73984,74065,74113 via svnmerge from
  svn+ssh://pythondev@svn.python.org/sandbox/trunk/2to3/lib2to3

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    r73771 | benjamin.peterson | 2009-07-02 10:56:55 -0500 (Thu, 02 Jul 2009) | 1 line

    force the imports fixer to be run after the import one #6400
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    r73811 | benjamin.peterson | 2009-07-03 09:03:14 -0500 (Fri, 03 Jul 2009) | 1 line

    check for sep, not pathsep when looking for a subpackage #6408
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    r73840 | benjamin.peterson | 2009-07-04 09:52:28 -0500 (Sat, 04 Jul 2009) | 1 line

    don't print diffs by default; it's annoying
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    r73842 | benjamin.peterson | 2009-07-04 09:58:46 -0500 (Sat, 04 Jul 2009) | 1 line

    complain when not showing diffs or writing
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    r73848 | alexandre.vassalotti | 2009-07-04 23:38:19 -0500 (Sat, 04 Jul 2009) | 2 lines

    Fix test_refactor_stdin to handle print_output() method with 4 arguments.
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    r73849 | alexandre.vassalotti | 2009-07-04 23:43:18 -0500 (Sat, 04 Jul 2009) | 5 lines

    Issue 2370: Add fixer for the removal of operator.isCallable() and
    operator.sequenceIncludes().

    Patch contributed by Jeff Balogh (and updated by me).
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    r73861 | benjamin.peterson | 2009-07-05 09:15:53 -0500 (Sun, 05 Jul 2009) | 1 line

    cleanup and use unicode where appropiate
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    r73957 | benjamin.peterson | 2009-07-11 15:49:56 -0500 (Sat, 11 Jul 2009) | 1 line

    fix calls to str() with unicode()
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    r73958 | benjamin.peterson | 2009-07-11 15:51:51 -0500 (Sat, 11 Jul 2009) | 1 line

    more str() -> unicode()
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    r73959 | benjamin.peterson | 2009-07-11 16:40:08 -0500 (Sat, 11 Jul 2009) | 1 line

    add tests for refactor_dir()
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    r73960 | benjamin.peterson | 2009-07-11 16:44:32 -0500 (Sat, 11 Jul 2009) | 1 line

    don't parse files just because they end with 'py' (no dot)
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    r73964 | benjamin.peterson | 2009-07-11 17:30:15 -0500 (Sat, 11 Jul 2009) | 1 line

    simplify
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    r73965 | benjamin.peterson | 2009-07-11 17:31:30 -0500 (Sat, 11 Jul 2009) | 1 line

    remove usage of get_prefix()
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    r73966 | benjamin.peterson | 2009-07-11 17:33:35 -0500 (Sat, 11 Jul 2009) | 1 line

    revert unintended change in 73965
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    r73967 | benjamin.peterson | 2009-07-11 17:34:44 -0500 (Sat, 11 Jul 2009) | 1 line

    avoid expensive checks and assume the node did change
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    r73968 | benjamin.peterson | 2009-07-11 20:46:46 -0500 (Sat, 11 Jul 2009) | 1 line

    use a regular dict for the heads to avoid adding lists in the loop
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    r73969 | benjamin.peterson | 2009-07-11 20:50:43 -0500 (Sat, 11 Jul 2009) | 1 line

    prefix headnode functions with '_'
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    r73972 | benjamin.peterson | 2009-07-11 21:25:45 -0500 (Sat, 11 Jul 2009) | 1 line

    try to make the head node dict as sparse as possible
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    r73973 | benjamin.peterson | 2009-07-11 21:59:49 -0500 (Sat, 11 Jul 2009) | 1 line

    a better idea; add an option to *not* print diffs
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    r73974 | benjamin.peterson | 2009-07-11 22:00:29 -0500 (Sat, 11 Jul 2009) | 1 line

    add space
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    r73977 | benjamin.peterson | 2009-07-12 10:16:07 -0500 (Sun, 12 Jul 2009) | 1 line

    update get_headnode_dict tests for recent changes
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    r73981 | benjamin.peterson | 2009-07-12 12:06:39 -0500 (Sun, 12 Jul 2009) | 4 lines

    detect when "from __future__ import print_function" is given

    Deprecate the 'print_function' option and the -p flag
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    r73984 | benjamin.peterson | 2009-07-12 16:16:37 -0500 (Sun, 12 Jul 2009) | 1 line

    add tests for Call; thanks Joe Amenta
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    r74065 | benjamin.peterson | 2009-07-17 12:52:49 -0500 (Fri, 17 Jul 2009) | 1 line

    pathname2url and url2pathname are in urllib.request not urllib.parse #6496
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    r74113 | benjamin.peterson | 2009-07-20 08:56:57 -0500 (Mon, 20 Jul 2009) | 1 line

    fix deprecation warnings in tests
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2009-07-20 16:42:03 +00:00

85 lines
2.8 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)'
No changes are applied if print_function is imported from __future__
"""
# Local imports
from .. import patcomp
from .. import pytree
from ..pgen2 import token
from .. import fixer_base
from ..fixer_util import Name, Call, Comma, String, is_tuple
parend_expr = patcomp.compile_pattern(
"""atom< '(' [atom|STRING|NAME] ')' >"""
)
class FixPrint(fixer_base.BaseFix):
PATTERN = """
simple_stmt< any* 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.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].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.prefix = node.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.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.prefix = " "
l_nodes.append(n_argument)