def __init__(self, token=None, name=None):
    assert name
    super(BaseListParser, self).__init__()
    self._token = token
    self._name = name
    self.syntactic_help = self._name % "a %s separated list"
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/python-gflags/gflags.py/BaseListParser.__init__/swapped operands of `%`