derivative.py 文件源码

def visit_escaped_numeric_character(self, node, children):
        [[escape, character_code]] = children
        if escape == '\\':
            # Octal escape code like '\077'
            return chr(int(character_code, 8))
        elif escape in ('\\u', '\\x', '\\U'):
            # hex escape like '\xff'
            return chr(int(character_code, 16))
        else:
            raise NotImplementedError('Unhandled character escape %s' % escape)