Bug after #2171 #2298
Description
@ferrine
running examples/arbitrary_stochastic.py returns error after #2171:
Traceback (most recent call last):
File "<ipython-input-7-612e002ded9a>", line 2, in <module>
trace = pm.sample(n_samples)
File "/usr/local/lib/python3.5/dist-packages/pymc3/sampling.py", line 240, in sample
progressbar=progressbar, **args)
File "/usr/local/lib/python3.5/dist-packages/pymc3/sampling.py", line 597, in init_nuts
obj_optimizer=pm.adagrad_window
File "/usr/local/lib/python3.5/dist-packages/pymc3/variational/inference.py", line 755, in fit
return inference.fit(n, **kwargs)
File "/usr/local/lib/python3.5/dist-packages/pymc3/variational/inference.py", line 123, in fit
step_func = self.objective.step_function(score=score, **kwargs)
File "/usr/local/lib/python3.5/dist-packages/pymc3/memoize.py", line 16, in memoizer
cache[key] = obj(*args, **kwargs)
File "/usr/local/lib/python3.5/dist-packages/theano/configparser.py", line 117, in res
return f(*args, **kwargs)
File "/usr/local/lib/python3.5/dist-packages/pymc3/variational/opvi.py", line 258, in step_function
total_grad_norm_constraint=total_grad_norm_constraint)
File "/usr/local/lib/python3.5/dist-packages/pymc3/variational/opvi.py", line 154, in updates
total_grad_norm_constraint=total_grad_norm_constraint
File "/usr/local/lib/python3.5/dist-packages/pymc3/variational/opvi.py", line 186, in add_obj_updates
obj_target = self(obj_z, more_obj_params=more_obj_params)
File "/usr/local/lib/python3.5/dist-packages/pymc3/variational/opvi.py", line 315, in __call__
self.op.apply(self.tf),
File "/usr/local/lib/python3.5/dist-packages/pymc3/variational/operators.py", line 24, in apply
return self.logq_norm(z) - self.logp_norm(z)
File "/usr/local/lib/python3.5/dist-packages/pymc3/variational/opvi.py", line 958, in logq_norm
return self.logq(z) / self.normalizing_constant
File "/usr/local/lib/python3.5/dist-packages/pymc3/variational/opvi.py", line 598, in normalizing_constant
tt.max([v.scaling for v in self.model.basic_RVs]))
File "/usr/local/lib/python3.5/dist-packages/pymc3/variational/opvi.py", line 598, in <listcomp>
tt.max([v.scaling for v in self.model.basic_RVs]))
AttributeError: 'MultiObservedRV' object has no attribute 'scaling'