code: def test_slices_warning(self, data, slices):
      with pytest.warns(UserWarning):
          from_emcee(data.obj, slices=slices)
  
imports: import os
  import numpy
  import pytest
  from ...None import from_emcee
  from ..helpers import _emcee_lnprior
  from ..helpers import _emcee_lnprob
  from ..helpers import chains, check_multiple_attrs, draws, eight_schools_params, importorskip, load_cached_models, needs_emcee3_func
label_desc: Use image node_id 7 for calling the TestDataEmcee obj's underlying member method code with example usage: obj.test_slices_warning(data, slices) without return types