Import lib2to3.

Lib/lib2to3/fixes/fix_unicode.py

@@ -0,0 +1,28 @@
+"""Fixer that changes unicode to str, unichr to chr, and u"..." into "...".
+
+"""
+
+import re
+from ..pgen2 import token
+from .import basefix
+
+class FixUnicode(basefix.BaseFix):
+
+  PATTERN = "STRING | NAME<'unicode' | 'unichr'>"
+
+  def transform(self, node, results):
+    if node.type == token.NAME:
+      if node.value == "unicode":
+        new = node.clone()
+        new.value = "str"
+        return new
+      if node.value == "unichr":
+        new = node.clone()
+        new.value = "chr"
+        return new
+      # XXX Warn when __unicode__ found?
+    elif node.type == token.STRING:
+      if re.match(r"[uU][rR]?[\'\"]", node.value):
+        new = node.clone()
+        new.value = new.value[1:]
+        return new