Python - Patsy apparently installed but python can't find it?

Question

So my installation for statsmodels has been very messy - I've actually had to move the folder into Enthought's site-packages folder myself. But anyway now, when I choose to import statsmodels.api as smapi, I get the following list of error messages:

ImportError                               Traceback (most recent call last)
/home/joshuajoseph/Desktop/ANU PhD 2016 onwards/msagnfracs.py in <module>()
      9 import matplotlib.cm as cm #colour maps for plotting
     10 from operator import truediv #to divide lists
---> 11 import statsmodels.api as smapi
     12 import statsmodels.graphics as smgraphics
     13 

/home/joshuajoseph/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/statsmodels/api.py in <module>()
      3 from . import tools
      4 from .tools.tools import add_constant, categorical
----> 5 from . import regression
      6 from .regression.linear_model import OLS, GLS, WLS, GLSAR
      7 from .regression.quantile_regression import QuantReg

/home/joshuajoseph/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/statsmodels/regression/__init__.py in <module>()
----> 1 from .linear_model import yule_walker
      2 
      3 from statsmodels import NoseWrapper as Tester
      4 test = Tester().test

/home/joshuajoseph/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/statsmodels/regression/linear_model.py in <module>()
     50                                           cache_readonly,
     51                                           cache_writable)
---> 52 import statsmodels.base.model as base
     53 import statsmodels.base.wrapper as wrap
     54 from statsmodels.emplike.elregress import _ELRegOpts

/home/joshuajoseph/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/statsmodels/base/model.py in <module>()
      9 import statsmodels.base.wrapper as wrap
     10 from statsmodels.tools.numdiff import approx_fprime
---> 11 from statsmodels.formula import handle_formula_data
     12 from statsmodels.compat.numpy import np_matrix_rank
     13 from statsmodels.base.optimizer import Optimizer

/home/joshuajoseph/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/statsmodels/formula/__init__.py in <module>()
      2 test = Tester().test
      3 
----> 4 from .formulatools import handle_formula_data

/home/joshuajoseph/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/statsmodels/formula/formulatools.py in <module>()
      1 from statsmodels.compat.python import iterkeys
      2 import statsmodels.tools.data as data_util
----> 3 from patsy import dmatrices, NAAction
      4 import numpy as np
      5 

ImportError: No module named patsy

So it would appear patsy isn't installed. But when I do pip install patsy, I get the following:

Requirement already satisfied (use --upgrade to upgrade): patsy in ./Enthought/Canopy_64bit/User/lib/python2.7/site-packages/patsy-0.4.1-py2.7.egg Requirement already satisfied (use --upgrade to upgrade): six in ./Enthought/Canopy_64bit/User/lib/python2.7/site-packages (from patsy) Requirement already satisfied (use --upgrade to upgrade): numpy in ./Enthought/Canopy_64bit/User/lib/python2.7/site-packages (from patsy)

and checking in my site-packages folder, I see this:

patsy-0.4.1-py2.7.egg

Which is what the above bit of code points to. But that's it. This alone clearly isn't helping me out with my statsmodels problem, yet I can't do any more to install patsy. If I try to upgrade it (pip install --upgrade patsy), I get this:

Requirement already up-to-date: patsy in ./patsy-0.4.1-py2.7.egg Requirement already up-to-date: six in /home/joshuajoseph/Enthought/Canopy_64bit/User/lib/python2.7/site-packages (from patsy) Requirement already up-to-date: numpy in /home/joshuajoseph/Enthought/Canopy_64bit/User/lib/python2.7/site-packages (from patsy)

Can anyone help me figure out what's going on?

It appears you are using a virtualenv. Are you sure the `patsy/` sub-directory (not the egg file) inside `site-packages/` has appropriate permissions/is present. You can also try to remove patsy first and then re-install it. — RedBaron, Mar 04 '16 at 04:36
Hi @RedBaron, that's just the problem though - there is no `patsy/` subdirectory in the `site-packages/` directory! — Joshua D'Agostino, Mar 04 '16 at 04:39
Then `patsy` isn't actually installed (pip only looks at egg file to see if the package is installed). You can run `pip remove patsy` and then `pip install patsy` from your virtualenv to re-install patsy properly. Just to be sure, you can run `pip remove patsy` multiple times (till it complains no `patsy` can be found) and then run the `install` — RedBaron, Mar 04 '16 at 05:01

score 0 · Answer 1 · edited Aug 04 '20 at 10:38

Go to the folder to where you installed your interpreter. In my case my interpreter was conda. So I found it in my AppData folder in C:\Users\%Username% folder.

Open the folder containing _conda.exe or whatever interpreter you installed
Go to the envs folder, assuming you already setup the environment for your interpreter. Then that folder should be there
Follow the sequence myenv\Lib\site-packages inside of it. In this directory this will display all the packages installed in your environment.
And if the patsy folder is not there go up the directory of the interpreter again and go to this directory Lib\site-packages. Most likely this is where you'll end up finding the package you installed.
Just find the files: patsy and patsy-0.5.1-py3.7.egg-info
Copy them and paste them in this directory myenv\Lib\site-packages again.

It worked for me. I hope it will work for you too

Python - Patsy apparently installed but python can't find it?

1 Answers1