code: def test_skewt_no_terms():
      """
      Tests an GAS model with no AR or SC terms, and that
      the latent variable list length is correct, and that the estimated
      latent variables are not nan
      """
      model = pf.GAS(data=data, ar=0, sc=0, family=pf.Skewt())
      x = model.fit()
      assert len(model.latent_variables.z_list) == 4
      lvs = np.array([i.value for i in model.latent_variables.z_list])
      assert len(lvs[np.isnan(lvs)]) == 0
  
file_path: pyflux/pyflux/gas/tests/gas_tests_skewt.py
imports: import numpy
  import pyflux
label_desc: Use image node_id 1 for calling a global function with example usage: test_skewt_no_terms() without return types