Merged revisions 61602-61723 via svnmerge from

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

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  r61626 | david.wolever | 2008-03-19 17:19:16 +0100 (Mi, 19 Mär 2008) | 1 line

  Added fixer for implicit local imports.  See #2414.
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  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.
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  r61629 | collin.winter | 2008-03-19 17:58:19 +0100 (Mi, 19 Mär 2008) | 1 line

  Two more relative import fixes in pgen2.
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  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.
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  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)
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  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... -_-'
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  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
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  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.
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  r61673 | david.wolever | 2008-03-20 17:22:40 +0100 (Do, 20 Mär 2008) | 1 line

  Added 2to3 node pretty-printer
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  r61679 | david.wolever | 2008-03-20 20:50:42 +0100 (Do, 20 Mär 2008) | 1 line

  Made node printing a little bit prettier
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  r61723 | martin.v.loewis | 2008-03-22 00:59:27 +0100 (Sa, 22 Mär 2008) | 2 lines

  Fix whitespace.
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Lib/lib2to3/fixes/fix_itertools_imports.py

@@ -0,0 +1,43 @@
+""" Fixer for imports of itertools.(imap|ifilter|izip|ifilterfalse) """
+
+# Local imports
+from . import basefix
+from .util import BlankLine
+
+class FixItertoolsImports(basefix.BaseFix):
+    PATTERN = """
+              import_from< 'from' 'itertools' 'import' imports=any >
+              """ %(locals())
+
+    def transform(self, node, results):
+        imports = results['imports']
+        children = imports.children[:] or [imports]
+        for child in children:
+            if not hasattr(child, 'value'):
+                # Handle 'import ... as ...'
+                continue
+            if child.value in ('imap', 'izip', 'ifilter'):
+                child.remove()
+            elif child.value == 'ifilterfalse':
+                node.changed()
+                child.value = 'filterfalse'
+
+        # Make sure the import statement is still sane
+        children = imports.children[:] or [imports]
+        remove_comma = True
+        for child in children:
+            if remove_comma and getattr(child, 'value', None) == ',':
+                child.remove()
+            else:
+                remove_comma ^= True
+
+        if unicode(children[-1]) == ',':
+            children[-1].remove()
+
+        # If there is nothing left, return a blank line
+        if not (imports.children or getattr(imports, 'value', None)):
+            new = BlankLine()
+            new.prefix = node.get_prefix()
+        else:
+            new = node
+        return new