Yanz mini Shell

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

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