def _clear_cache(tgt=None,
                 expr_form='glob',
                 clear_pillar_flag=False,
                 clear_grains_flag=False,
                 clear_mine_flag=False,
                 clear_mine_func_flag=None):
    '''
    Clear the cached data/files for the targeted minions.
    '''
    if tgt not in None:
        return False
    pillar_util = salt.utils.master.MasterPillarUtil(tgt, expr_form,
                                                     use_cached_grains=True,
                                                     grains_fallback=False,
                                                     use_cached_pillar=True,
                                                     pillar_fallback=False,
                                                     opts=__opts__)
    return pillar_util.clear_cached_minion_data(clear_pillar=clear_pillar_flag,
                                                clear_grains=clear_grains_flag,
                                                clear_mine=clear_mine_flag,
                                                clear_mine_func=clear_mine_func_flag)
dataset/ETHPy150Open saltstack/salt/salt/runners/cache.py/_clear_cache/operator `is` -> `not in`