Merge pull request #348 from omit66/bugfix-touch_import_top

fixed undefined variable children_hooks + imports cleanup

src/libfuturize/fixer_util.py

@@ -9,11 +9,11 @@
 """
 
 from lib2to3.fixer_util import (FromImport, Newline, is_import,
-                                find_root, does_tree_import, Comma)
+                                find_root, does_tree_import,
+                                Call, Name, Comma)
 from lib2to3.pytree import Leaf, Node
-from lib2to3.pygram import python_symbols as syms, python_grammar
+from lib2to3.pygram import python_symbols as syms
 from lib2to3.pygram import token
-from lib2to3.fixer_util import (Node, Call, Name, syms, Comma, Number)
 import re
 
 
@@ -447,7 +447,6 @@ def check_future_import(node):
     else:
         node = node.children[3]
     # now node is the import_as_name[s]
-    # print(python_grammar.number2symbol[node.type])  # breaks sometimes
     if node.type == syms.import_as_names:
         result = set()
         for n in node.children: