25 lines
685 B
Python
25 lines
685 B
Python
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"""Optional fixer that changes all unprefixed string literals "..." to b"...".
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br'abcd' is a SyntaxError on Python 2 but valid on Python 3.
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ur'abcd' is a SyntaxError on Python 3 but valid on Python 2.
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"""
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from __future__ import unicode_literals
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import re
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from lib2to3.pgen2 import token
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from lib2to3 import fixer_base
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_literal_re = re.compile(r"[^bBuUrR]?[\'\"]")
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class FixBytes(fixer_base.BaseFix):
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BM_compatible = True
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PATTERN = "STRING"
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def transform(self, node, results):
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if node.type == token.STRING:
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if _literal_re.match(node.value):
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new = node.clone()
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new.value = u'b' + new.value
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return new
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