| 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 |
