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