Can't use if Variable anymore

Author: jessegrabowski

pymc_extras/statespace/core/statespace.py

@@ -707,7 +707,7 @@ def _insert_random_variables(self):
         with pymc_model:
             for param_name in self.param_names:
                 param = getattr(pymc_model, param_name, None)
-                if param:
+                if param is not None:
                     found_params.append(param.name)
 
         missing_params = list(set(self.param_names) - set(found_params))