

def match_parameter(rest):
    for match in (match_old, match_new):
        (p, rest) = match(rest)
        if p:
            return (p, p)
    return (None, rest)

dataset/ETHPy150Open mailgun/flanker/flanker/mime/message/headers/parametrized.py match_parameter/VarMisuse@41/47 `rest`->`p`