Merged revisions 61596-61597 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/trunk

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  r61596 | martin.v.loewis | 2008-03-18 23:43:46 -0500 (Di, 18 Mär 2008) | 2 lines

  Import lib2to3.
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  r61597 | martin.v.loewis | 2008-03-18 23:58:04 -0500 (Di, 18 Mär 2008) | 3 lines

  Initialized merge tracking via "svnmerge" with revisions "1-61595" from
  svn+ssh://pythondev@svn.python.org/sandbox/trunk/2to3/lib2to3
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Lib/lib2to3/fixes/fix_itertools.py

@@ -0,0 +1,36 @@
+""" Fixer for itertools.(imap|ifilter|izip) --> (map|filter|zip) and
+    itertools.ifilterfalse --> itertools.filterfalse (bugs 2360-2363)
+
+    If itertools is imported as something else (ie: import itertools as it;
+    it.izip(spam, eggs)) method calls will not get fixed.
+    """
+
+# Local imports
+from . import basefix
+from .util import Name
+
+class FixItertools(basefix.BaseFix):
+    it_funcs = "('imap'|'ifilter'|'izip'|'ifilterfalse')"
+    PATTERN = """
+              power< it='itertools'
+                  trailer<
+                     dot='.' func=%(it_funcs)s > trailer< '(' [any] ')' > >
+              |
+              power< func=%(it_funcs)s trailer< '(' [any] ')' > >
+              """ %(locals())
+
+    def transform(self, node, results):
+        prefix = None
+        func = results['func'][0]
+        if 'it' in results and func.value != 'ifilterfalse':
+            dot, it = (results['dot'], results['it'])
+            # Remove the 'itertools'
+            prefix = it.get_prefix()
+            it.remove()
+            # Replace the node wich contains ('.', 'function') with the
+            # function (to be consistant with the second part of the pattern)
+            dot.remove()
+            func.parent.replace(func)
+
+        prefix = prefix or func.get_prefix()
+        func.replace(Name(func.value[1:], prefix=prefix))