cannot import a module after os.chdir() [duplicate]

Question

I have a python file with the class A defined in it in a different directory than the one I am working in. I want to import a module from that class in my script. I wrote something like this in jupyter:

import os parent_dir = 'path/to/class' os.chdir(parent_dir) from A import a

It works perfectly fine and I get to execute the program. However when I run the script in the same directory from the terminal, I get this error:

ModuleNotFoundError: No module named 'a'

I put a os.getcwd() before the error to make sure it is in the same directory, and when I go to that directory from the terminal and import the module directly there are no errors. I wonder why I get this error when running the script.

Daniel · Accepted Answer · 2018-05-10 19:02:02Z

16

Don't use os.chdir, because it changes a global state, that can lead to unexpected behaviour somewhere else.

Expand sys.path:

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

answered May 10, 2018 at 19:02

Daniel

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2 Comments

Jean-François Fabre Over a year ago

it's better to do sys.path.append(os.path.join(os.path.dirname(__file__),'path/to/module')

Daniel Over a year ago

@Jean-FrançoisFabre: I did have this version, but not sure, if the OP uses paths relative to the script file.

Xayden Rosario · Accepted Answer · 2018-05-10 19:06:38Z

-2

You can use from path.to.class import className

answered May 10, 2018 at 19:06

Xayden Rosario

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