How to fix ImportError No module named error in Python

Question

What is the correct way to fix this ImportError error   I have the following directory structure    home bodacydo  home bodacydo work  home bodacydo work project  home bodacydo work project programs  home bodacydo work project foo   And I am in the directory   home bodacydo work project   Now if I type  python   programs my python program py   I instantly get  ImportError  No module named foo tasks   The   programs my python program py contains the following line   from foo tasks import my function   I can t understand why python won t find   foo tasks py - it s there   If I do it from the Python shell  then it works   python  gt  gt  gt  from foo tasks import my function   It only doesn t work if I call it via python   programs my python program py script

User · Answer

Here is a step-by-step solution    Add a script called run py in  home bodacydo work project and edit it like this    import programs my python program programs my python program main       replace main   with your equivalent method in my python program   Go to  home bodacydo work project Run run py   Explanation  Since python appends to PYTHONPATH the path of the script from which it runs  running run py will append  home bodacydo work project  And voil    import foo tasks will be found

User · Answer

Python does not add the current directory to sys path  but rather the directory that the script is in  Add  home bodacydo work project to either sys path or  PYTHONPATH

User · Answer

If you have this problem when using an instaled version  when using setup py  make sure your module is included inside packages  setup name  Your program       version  0 7 0       description  Your desccription       packages   foo    foo bar      add  foo bar  here

User · Answer

Example solution for adding the library to your PYTHONPATH    Add the following line into your    bashrc or just run it directly   export PYTHONPATH   PYTHONPATH  HOME  python   Then link your required library into your    python folder  e g   ln -s  home user work project foo    python

User · Answer

A better fix than setting PYTHONPATH is to use python -m module path  This will correctly set sys path 0  and is a more reliable way to execute modules   I have a quick writeup about this problem  as other answerers have mentioned  the reason for this is python path to file py puts path to on the beginning of the PYTHONPATH  sys path

User · Answer

In my mind I have to consider that the foo folder is a stand-alone library   I might want to consider moving it to the Lib site-packages folder within a python installation   I might want to consider adding a foo pth file there   I know it s a library since the   programs my python program py contains the following line      from foo tasks import my function   So it doesn t matter that   programs is a sibling folder to   foo  It s the fact that my python program py is run as a script like this        python   programs my python program py

User · Answer

Do you have a file called   init   py in the foo directory   If not then python won t recognise foo as a python package   See the section on packages in the python tutorial for more information

[python] How to fix "ImportError: No module named ..." error in Python?

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