How to prevent anaconda environment from reading libraries installed in local

Question

Python tries to read a library installed under ~/.local, even though I am working on an anaconda environment.

> conda create -n testproj python=3.6
> conda activate testproj
> conda install pandas
> python
>>> import pandas as pd

Then I got an ImportError

ImportError: C extension: /home/myname/.local/lib/python3.6/site-packages/pandas/ ...

But if I change the permission of site-packages

> chmod 000 ~/.local/lib/python3.6/site-packages

Then I can import pandas without any error. Namely Python is looking at outside of the anaconda environment.

Question: How can I prevent Python from reading libraries outside the anaconda environment?

Environment: openSUSE Leap 15.0

EDIT: I found that sys.path contains site-packages under ~/.local. I do not think that the lines should be there.

['',
 '/home/myname/anaconda3/envs/myproj/bin',
 '/home/myname/anaconda3/envs/myproj/lib/python36.zip',
 '/home/myname/anaconda3/envs/myproj/lib/python3.6',
 '/home/myname/anaconda3/envs/myproj/lib/python3.6/lib-dynload',
 '/home/myname/.local/lib/python3.6/site-packages',
 '/home/myname/anaconda3/envs/myproj/lib/python3.6/site-packages',
 '/home/myname/.local/lib/python3.6/site-packages/IPython/extensions',
 '/home/myname/.ipython']

Answer 1

I get the same behavior on windows, clean environments include your user local packages. This is an open issue: https://github.com/conda/conda/issues/7173. conda doesn't support doing what you're asking directly (yet).

You can always just set the environment variable PYTHONNOUSERSITE (to any value), or invoke your interpreter with the -s switch, and you wont get your local packages (~/.local on windows is C:\Users\<username>\AppData\Roaming\Python\Python36\site-packages):

(test-env) C:\Users\matt>python -m site
sys.path = [
    'C:\\Users\\matt',
    'C:\\Anaconda440\\envs\\test-env\\python36.zip',
    'C:\\Anaconda440\\envs\\test-env\\DLLs',
    'C:\\Anaconda440\\envs\\test-env\\lib',
    'C:\\Anaconda440\\envs\\test-env',
    'C:\\Users\\matt\\AppData\\Roaming\\Python\\Python36\\site-packages',
    'C:\\Users\\matt\\AppData\\Roaming\\Python\\Python36\\site-packages\\some_lib-1.0-py3.6.egg',
    'C:\\Anaconda440\\envs\\test-env\\lib\\site-packages',
]
USER_BASE: 'C:\\Users\\matt\\AppData\\Roaming\\Python' (exists)
USER_SITE: 'C:\\Users\\matt\\AppData\\Roaming\\Python\\Python36\\site-packages' (exists)
ENABLE_USER_SITE: True

versus (note the -s switch, and now my local packages are no longer on my sys.path):

(test-env) C:\Users\matt>python -s -m site
sys.path = [
    'C:\\Users\\matt',
    'C:\\Anaconda440\\envs\\test-env\\python36.zip',
    'C:\\Anaconda440\\envs\\test-env\\DLLs',
    'C:\\Anaconda440\\envs\\test-env\\lib',
    'C:\\Anaconda440\\envs\\test-env',
    'C:\\Anaconda440\\envs\\test-env\\lib\\site-packages',
]
USER_BASE: 'C:\\Users\\matt\\AppData\\Roaming\\Python' (exists)
USER_SITE: 'C:\\Users\\matt\\AppData\\Roaming\\Python\\Python36\\site-packages' (exists)
ENABLE_USER_SITE: False

HTH.