AppPkg/Applications/Python/Python-2.7.2/Lib/lib2to3/fixes/fix_unicode.py

   1 """Fixer that changes unicode to str, unichr to chr, and u"..." into "...".
   2
   3 """
   4
   5 import re
   6 from ..pgen2 import token
   7 from .. import fixer_base
   8
   9 _mapping = {u"unichr" : u"chr", u"unicode" : u"str"}
  10 _literal_re = re.compile(ur"[uU][rR]?[\'\"]")
  11
  12 class FixUnicode(fixer_base.BaseFix):
  13     BM_compatible = True
  14     PATTERN = "STRING | 'unicode' | 'unichr'"
  15
  16     def transform(self, node, results):
  17         if node.type == token.NAME:
  18             new = node.clone()
  19             new.value = _mapping[node.value]
  20             return new
  21         elif node.type == token.STRING:
  22             if _literal_re.match(node.value):
  23                 new = node.clone()
  24                 new.value = new.value[1:]
  25                 return new