manipulation_set.py 文件源码

def parser(cls):
        unpack = pp.Suppress("unpack")

        packed_col_name = common_parsers.column
        dict_key = pp.Suppress("[") + pp.QuotedString(quoteChar="'") + pp.Suppress("]")
        dict_key_grp = pp.Group(pp.OneOrMore(dict_key))
        new_col_name = common_parsers.column

        unpack_arg = new_col_name + pp.Suppress("=") + packed_col_name + dict_key_grp
        unpack_arg.setParseAction(lambda x: {'packed_col': x[1], 'key_list': x[2], 'new_col_name': x[0]})

        parser = unpack + pp.Suppress("(") + pp.delimitedList(unpack_arg) + pp.Suppress(")")
        parser.setParseAction(lambda x: Unpack(unpack_list=x))
        return parser