python can't import module when running a file, but can import the module in interactive shell

Question

I got a strange problem.

filegetter is a module developed by someone else and installed with python setup.py install.

Here is a test file.

#instance.py
import filegetter

when I run

/home/ynx/miniconda3/bin/python /home/ynx/notebook/instance.py

it says:

Traceback (most recent call last):
  File "/home/ynx/notebook/instance.py", line 2, in <module>
    import filegetter
ModuleNotFoundError: No module named 'filegetter'

But if I run an interactive shell: python

>>> import filegetter
>>>

It works.
I am sure the same python bin is used by check which, why and how can I import it in the file mode?

Asked By: YNX

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Source

Answer 1

This looks like a problem with sys.path. When you run the Python shell, the path to the current directory is added to sys.path, making modules in this directory import-able. To make a module available to all of your Python programs, store it in the user site directory, which you can find with

$ python -m site --user-site

Alternatively, place a script called usercustomize.py in the user site directory, which manually adds paths to sys.path:

import sys
sys.path.append('/path/to')

where the full path of filegetter.py would be /path/to/filegetter.py

Answered By: Aemyl

python can't import module when running a file, but can import the module in interactive shell

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