def get_kper_entry(self, kper):
        if kper in self.transient_2ds:
            return (1, self.transient_2ds[kper].get_file_entry())
        elif kper < min(self.transient_2ds.keys()):
            return (1, self.get_zero_2d(kper).get_file_entry())
        else:
            return (-1, '')
get the file entry info for a given kper
dataset/ETHPy150Open modflowpy/flopy/flopy/utils/util_array.py/Transient2d.get_kper_entry