model = mix.GaussianMixture(n_components=2,
                            covariance_type="full",
                            n_init=100,
                            random_state=7).fit(dataframe)

array([( 50121, 0), ( 50121, 1), ( 50121, 1), ..., (362374, 1),
       (362374, 1), (362374, 1)],
      dtype=[('user_id', '<i8'), ('correct', '<i8')])

ValueError: Can't cast from structure to non-structure, except if the structure only has a single field.