def __init__(self):
        if self._init_done:
            raise SystemError('__init__ called too many times')
        self._init_done = True
UNIT test: services.simulation.create_pass_slots_sc
dataset/ETHPy150Open django-ddp/django-ddp/dddp/__init__.py/ThreadLocal.__init__--crossover with--dataset/ETHPy150Open satnet-project/server/services/simulation/tests/models/test_passes.py/TestModels.test_pass_models