Cannot import statsmodels.formula.api

Question

Whenever i am trying to import statsmodels.formula.api as smf i get the following error.

import statsmodels.formula.api as smf

Traceback (most recent call last):

File "<ipython-input-257-268d740a5877>", line 1, in <module>
   import statsmodels.formula.api as smf

File "C:\Users\ldresl\Anaconda3\lib\site- 
    packages\statsmodels\formula\__init__.py", line 1, in <module>
  from statsmodels import PytestTester

 ImportError: cannot import name 'PytestTester'

Answer 1

You will have to update the package pytest and restart your kernel:

pip install pytest --upgrade

I had this problem importing statsmodels in a Jupyter notebook (Anaconda distribution). If you run on the same set-up, you can update a package in Anaconda like so:

conda update pytest

Do not forget to restart the kernel in the top navigation of your notebook afterwards. Hope that helps.

Answer 2

Worked for me,

1. pip install statsmodels --upgrade

2. pip install pytest --upgrade

Restart Kernel