@pytest.fixture(params=['object', 'int64', 'float64', 'complex128', 'bool', 'datetime64[ns]', 'datetime64[ns, UTC]', 'datetime64[ns, US/Eastern]', 'timedelta64[ns]'], ids=['object', 'int64', 'float64', 'complex128', 'bool', 'datetime64', 'datetime64tz', 'datetime64tz', 'timedelta64'])
def to_key(self, request):
    return request.param
@pytest.fixture(params=['object', 'int64', 'float64', 'complex128', 'bool', 'datetime64[ns]', 'datetime64[ns, UTC]', 'datetime64[ns, US/Eastern]', 'timedelta64[ns]'], ids=['object', 'int64', 'float64', 'complex128', 'bool', 'datetime64', 'datetime64tz', 'datetime64tz', 'timedelta64'])
def to_key(self, request):
    return request.param