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svn+ssh://pythondev@svn.python.org/sandbox/trunk/2to3/lib2to3 ........ r61730 | martin.v.loewis | 2008-03-22 02:20:58 +0100 (Sa, 22 Mär 2008) | 2 lines More explicit relative imports. ........ r61755 | david.wolever | 2008-03-22 21:33:52 +0100 (Sa, 22 Mär 2008) | 1 line Fixing #2446 -- 2to3 now translates 'import foo' to 'from . import foo' ........ r61824 | david.wolever | 2008-03-24 01:30:24 +0100 (Mo, 24 Mär 2008) | 3 lines Fixed a bug where 'from itertools import izip' would return 'from itertools import' ........
45 lines
1.6 KiB
Python
45 lines
1.6 KiB
Python
""" Fixer for imports of itertools.(imap|ifilter|izip|ifilterfalse) """
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# Local imports
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from . import basefix
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from .util import BlankLine
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class FixItertoolsImports(basefix.BaseFix):
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PATTERN = """
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import_from< 'from' 'itertools' 'import' imports=any >
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""" %(locals())
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def transform(self, node, results):
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imports = results['imports']
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children = imports.children[:] or [imports]
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for child in children:
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if not hasattr(child, 'value'):
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# Handle 'import ... as ...'
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continue
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if child.value in ('imap', 'izip', 'ifilter'):
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# The value must be set to none in case child == import,
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# so that the test for empty imports will work out
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child.value = None
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child.remove()
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elif child.value == 'ifilterfalse':
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node.changed()
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child.value = 'filterfalse'
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# Make sure the import statement is still sane
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children = imports.children[:] or [imports]
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remove_comma = True
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for child in children:
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if remove_comma and getattr(child, 'value', None) == ',':
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child.remove()
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else:
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remove_comma ^= True
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if unicode(children[-1]) == ',':
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children[-1].remove()
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# If there are no imports left, just get rid of the entire statement
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if not (imports.children or getattr(imports, 'value', None)):
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p = node.get_prefix()
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node = BlankLine()
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node.prefix = p
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return node
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