TypeError when running gravity.fit(fdf, relevance_column = 'population')

[jonpappalord]

When running gravity.fit(fdf, relevance_column = 'population') I get this error:

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
Input In [21], in <module>
     13 gravity = Gravity(gravity_type = 'singly constrained')
     14 print(gravity)
---> 16 gravity.fit(fdf, relevance_column = 'population')
     17 print(gravity)
     19 fdf_fitted = gravity.generate(tessellation, relevance_column = 'population',
     20                               out_format = 'probabilities', tile_id_column = 'tile_id')

File /opt/anaconda3/envs/skmob/lib/python3.9/site-packages/skmob/models/gravity.py:474, in Gravity.fit(self, flow_df, relevance_column)
    471 flow_df.apply(lambda flow_example: self._update_training_set(flow_example), axis=1)
    473 # Perform GLM fit
--> 474 poisson_model = GLM(self.y, self.X, family=sm.genmod.families.family.Poisson(link=sm.genmod.families.links.log))
    475 poisson_results = poisson_model.fit()
    477 # Set best fit parameters

File /opt/anaconda3/envs/skmob/lib/python3.9/site-packages/statsmodels/genmod/families/family.py:401, in Poisson.__init__(self, link)
    399 if link is None:
    400     link = L.Log()
--> 401 super(Poisson, self).__init__(link=link, variance=Poisson.variance)

File /opt/anaconda3/envs/skmob/lib/python3.9/site-packages/statsmodels/genmod/families/family.py:83, in Family.__init__(self, link, variance)
     78 if inspect.isclass(link):
     79     warnmssg = (
     80         "Calling Family(..) with a link class is not allowed. Use an "
     81         "instance of a link class instead."
     82     )
---> 83     raise TypeError(warnmssg)
     84 else:
     85     self.link = link

TypeError: Calling Family(..) with a link class is not allowed. Use an instance of a link class instead.

[FilippoSimini]

fixed by PR #225

[ajahanba]

This issue is not fixed yet. I still experience the same error.