def append(self, key, value):
        self.dict.setdefault(key, []).append(value)
call <name> <arg1>...
dataset/ETHPy150Open Arelle/Arelle/arelle/webserver/bottle.py/MultiDict.append--crossover with--dataset/ETHPy150Open kdart/pycopia/fepy/pycopia/fepy/CLI.py/GenericCLI.call