删除sudo以运行python脚本

Question

Every time that I need to run my python program with:

python my_program.py

I get some error saying that some import was not found.

Some error like this:

Traceback (most recent call last):
  File "graphic.py", line 1, in <module>
    import matplotlib.pyplot as plt
ImportError: No module named 'matplotlib'

Than I run:

sudo python my_program.py

And every thing works just fine. How do I remove the sudo command to run my python codes?

Answer 1

ImportError: No module named 'matplotlib' happens when your Python doesn't find the module. sudo changes the enviornment variables; That's why.

To fix this, locate where matplotlib is installed in your computer, and verify the folder is part of your sys.path .

import sys
sys.path
['C:\\Python27\\tests', ..., ...]

Then you've two options: insert that path from your script, ie adding a line such import sys; sys.path.append(<folder>) import sys; sys.path.append(<folder>) or configure PYTHONPATH env variable under your user appending the folder to the path.

PYTHONPATH env variable gets loaded to sys.path on startup.

Answer 2

Best solution to me is a general workflow for all projects: use virtualenviroment] 1 .

sudo pip3 install virtualenv
virtualenv myenv
source mynenv/bin/activate

Then you should install your libraries again with pip and they will be installed in your virtualenviroment, isolated from everything else.