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- """Fixer that changes unicode to str and unichr to chr, but -- unlike the
- lib2to3 fix_unicode.py fixer, does not change u"..." into "...".
- The reason is that Py3.3+ supports the u"..." string prefix, and, if
- present, the prefix may provide useful information for disambiguating
- between byte strings and unicode strings, which is often the hardest part
- of the porting task.
- """
- from lib2to3.pgen2 import token
- from lib2to3 import fixer_base
- _mapping = {u"unichr" : u"chr", u"unicode" : u"str"}
- class FixUnicodeKeepU(fixer_base.BaseFix):
- BM_compatible = True
- PATTERN = "'unicode' | 'unichr'"
- def transform(self, node, results):
- if node.type == token.NAME:
- new = node.clone()
- new.value = _mapping[node.value]
- return new
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