Merged revisions 67180 via svnmerge from

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

................
  r67180 | benjamin.peterson | 2008-11-10 16:11:12 -0600 (Mon, 10 Nov 2008) | 29 lines

  Merged revisions 66985,67170,67173,67177-67179 via svnmerge from
  svn+ssh://pythondev@svn.python.org/sandbox/trunk/2to3/lib2to3

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    r66985 | benjamin.peterson | 2008-10-20 16:43:46 -0500 (Mon, 20 Oct 2008) | 1 line

    no need to use nested try, except, finally
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    r67170 | benjamin.peterson | 2008-11-08 12:28:31 -0600 (Sat, 08 Nov 2008) | 1 line

    fix #4271: fix_imports didn't recognize imports with parenthesis (ie from x import (a, b))
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    r67173 | benjamin.peterson | 2008-11-08 17:42:08 -0600 (Sat, 08 Nov 2008) | 1 line

    consolidate test
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    r67177 | benjamin.peterson | 2008-11-09 21:52:52 -0600 (Sun, 09 Nov 2008) | 1 line

    let the metclass fixer handle complex assignments in the class body gracefully
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    r67178 | benjamin.peterson | 2008-11-10 15:26:43 -0600 (Mon, 10 Nov 2008) | 1 line

    the metaclass fixers shouldn't die when bases are not a simple name
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    r67179 | benjamin.peterson | 2008-11-10 15:29:58 -0600 (Mon, 10 Nov 2008) | 1 line

    allow the fix_import pattern to catch from imports with parenthesis
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1 files changed, 4 insertions, 5 deletions

diff --git a/Lib/lib2to3/fixes/fix_metaclass.py b/Lib/lib2to3/fixes/fix_metaclass.py
index 7479024..c2f4b7f 100644
--- a/Lib/lib2to3/fixes/fix_metaclass.py
+++ b/Lib/lib2to3/fixes/fix_metaclass.py
@@ -35,8 +35,9 @@ def has_metaclass(parent):
         elif node.type == syms.simple_stmt and node.children:
             expr_node = node.children[0]
             if expr_node.type == syms.expr_stmt and expr_node.children:
-                leaf_node = expr_node.children[0]
-                if leaf_node.value == '__metaclass__':
+                left_side = expr_node.children[0]
+                if isinstance(left_side, Leaf) and \
+                        left_side.value == '__metaclass__':
                     return True
     return False
 
@@ -165,12 +166,10 @@ class FixMetaclass(fixer_base.BaseFix):
             if node.children[3].type == syms.arglist:
                 arglist = node.children[3]
             # Node(classdef, ['class', 'name', '(', 'Parent', ')', ':', suite])
-            elif isinstance(node.children[3], Leaf):
+            else:
                 parent = node.children[3].clone()
                 arglist = Node(syms.arglist, [parent])
                 node.set_child(3, arglist)
-            else:
-                raise ValueError("Unexpected class inheritance arglist")
         elif len(node.children) == 6:
             # Node(classdef, ['class', 'name', '(',  ')', ':', suite])
             #                 0        1       2     3    4    5