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43 lines
1.2 KiB
43 lines
1.2 KiB
6 years ago
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r"""Fixer for unicode.
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* Changes unicode to str and unichr to chr.
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* If "...\u..." is not unicode literal change it into "...\\u...".
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* Change u"..." into "...".
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"""
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from ..pgen2 import token
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from .. import fixer_base
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_mapping = {"unichr" : "chr", "unicode" : "str"}
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class FixUnicode(fixer_base.BaseFix):
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BM_compatible = True
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PATTERN = "STRING | 'unicode' | 'unichr'"
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def start_tree(self, tree, filename):
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super(FixUnicode, self).start_tree(tree, filename)
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self.unicode_literals = 'unicode_literals' in tree.future_features
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def transform(self, node, results):
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if node.type == token.NAME:
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new = node.clone()
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new.value = _mapping[node.value]
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return new
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elif node.type == token.STRING:
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val = node.value
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if not self.unicode_literals and val[0] in '\'"' and '\\' in val:
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val = r'\\'.join([
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v.replace('\\u', r'\\u').replace('\\U', r'\\U')
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for v in val.split(r'\\')
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])
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if val[0] in 'uU':
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val = val[1:]
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if val == node.value:
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return node
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new = node.clone()
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new.value = val
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return new
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