Yes, I installed pystan, pymc3 with its dependencies, I installed and reinstalled and can’t. The same thing happened to me with numpy, seaborn and others modules then after to reinstall this it works very well. Instead when I try import pystan and pymc3 return:
WARNING (theano.tensor.blas): Using NumPy C-API based implementation for BLAS functions.
Traceback (most recent call last):
File “model.py”, line 3, in
import pystan
ImportError: No module named pystan