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svn+ssh://pythondev@svn.python.org/sandbox/trunk/2to3/lib2to3 ........ r61626 | david.wolever | 2008-03-19 17:19:16 +0100 (Mi, 19 Mär 2008) | 1 line Added fixer for implicit local imports. See #2414. ........ r61628 | david.wolever | 2008-03-19 17:57:43 +0100 (Mi, 19 Mär 2008) | 1 line Added a class for tests which should not run if a particular import is found. ........ r61629 | collin.winter | 2008-03-19 17:58:19 +0100 (Mi, 19 Mär 2008) | 1 line Two more relative import fixes in pgen2. ........ r61635 | david.wolever | 2008-03-19 20:16:03 +0100 (Mi, 19 Mär 2008) | 1 line Fixed print fixer so it will do the Right Thing when it encounters __future__.print_function. 2to3 gets upset, though, so the tests have been commented out. ........ r61637 | david.wolever | 2008-03-19 21:37:17 +0100 (Mi, 19 Mär 2008) | 3 lines Added a fixer for itertools imports (from itertools import imap, ifilterfalse --> from itertools import filterfalse) ........ r61645 | david.wolever | 2008-03-19 23:22:35 +0100 (Mi, 19 Mär 2008) | 1 line SVN is happier when you add the files you create... -_-' ........ r61654 | david.wolever | 2008-03-20 01:09:56 +0100 (Do, 20 Mär 2008) | 1 line Added an explicit sort order to fixers -- fixes problems like #2427 ........ r61664 | david.wolever | 2008-03-20 04:32:40 +0100 (Do, 20 Mär 2008) | 3 lines Fixes #2428 -- comments are no longer eatten by __future__ fixer. ........ r61673 | david.wolever | 2008-03-20 17:22:40 +0100 (Do, 20 Mär 2008) | 1 line Added 2to3 node pretty-printer ........ r61679 | david.wolever | 2008-03-20 20:50:42 +0100 (Do, 20 Mär 2008) | 1 line Made node printing a little bit prettier ........ r61723 | martin.v.loewis | 2008-03-22 00:59:27 +0100 (Sa, 22 Mär 2008) | 2 lines Fix whitespace. ........
90 lines
2.9 KiB
Python
90 lines
2.9 KiB
Python
# Copyright 2006 Google, Inc. All Rights Reserved.
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# Licensed to PSF under a Contributor Agreement.
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"""Fixer for print.
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Change:
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'print' into 'print()'
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'print ...' into 'print(...)'
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'print ... ,' into 'print(..., end=" ")'
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'print >>x, ...' into 'print(..., file=x)'
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No changes are applied if print_function is imported from __future__
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"""
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# Local imports
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from .. import patcomp
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from .. import pytree
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from ..pgen2 import token
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from .import basefix
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from .util import Name, Call, Comma, String, is_tuple
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parend_expr = patcomp.compile_pattern(
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"""atom< '(' [atom|STRING|NAME] ')' >"""
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)
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class FixPrint(basefix.ConditionalFix):
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PATTERN = """
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simple_stmt< bare='print' any > | print_stmt
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"""
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skip_on = '__future__.print_function'
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def transform(self, node, results):
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assert results
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if self.should_skip(node):
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return
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bare_print = results.get("bare")
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if bare_print:
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# Special-case print all by itself
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bare_print.replace(Call(Name("print"), [],
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prefix=bare_print.get_prefix()))
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return
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assert node.children[0] == Name("print")
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args = node.children[1:]
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if len(args) == 1 and parend_expr.match(args[0]):
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# We don't want to keep sticking parens around an
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# already-parenthesised expression.
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return
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sep = end = file = None
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if args and args[-1] == Comma():
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args = args[:-1]
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end = " "
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if args and args[0] == pytree.Leaf(token.RIGHTSHIFT, ">>"):
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assert len(args) >= 2
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file = args[1].clone()
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args = args[3:] # Strip a possible comma after the file expression
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# Now synthesize a print(args, sep=..., end=..., file=...) node.
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l_args = [arg.clone() for arg in args]
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if l_args:
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l_args[0].set_prefix("")
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if sep is not None or end is not None or file is not None:
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if sep is not None:
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self.add_kwarg(l_args, "sep", String(repr(sep)))
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if end is not None:
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self.add_kwarg(l_args, "end", String(repr(end)))
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if file is not None:
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self.add_kwarg(l_args, "file", file)
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n_stmt = Call(Name("print"), l_args)
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n_stmt.set_prefix(node.get_prefix())
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return n_stmt
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def add_kwarg(self, l_nodes, s_kwd, n_expr):
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# XXX All this prefix-setting may lose comments (though rarely)
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n_expr.set_prefix("")
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n_argument = pytree.Node(self.syms.argument,
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(Name(s_kwd),
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pytree.Leaf(token.EQUAL, "="),
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n_expr))
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if l_nodes:
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l_nodes.append(Comma())
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n_argument.set_prefix(" ")
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l_nodes.append(n_argument)
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