import error: 'No module named' *does* exist

Question

I am getting this stack trace when I start pyramid pserve:

% python $(which pserve) ../etc/development.ini
Traceback         


        

Answer 1

I got this when I didn't type things right. I had

__init.py__ 

instead of

__init__.py

Answer 2

My usual trick is to simply print sys.path in the actual context where the import problem happens. In your case it'd seem that the place for the print is in /home/hughdbrown/.local/bin/pserve . Then check dirs & files in the places that path shows..

You do that by first having:

import sys

and in python 2 with print expression:

print sys.path

or in python 3 with the print function:

print(sys.path)

Answer 3

The PYTHONPATH is not set properly. Export it using export PYTHONPATH=$PYTHONPATH:/path/to/your/modules .

Answer 4

I met the same problem, and I try the pdb.set_trace() before the error line.

My problem is the package name duplicate with the module name, like:

test
├── __init__.py
├── a
│   ├── __init__.py
│   └── test.py
└── b
    └── __init__.py

and at file a/__init__.py, using from test.b import xxx will cause ImportError: No module named b.

Answer 5

I had the same problem, and I solved it by adding the following code to the top of the python file:

import sys
import os

sys.path.append(os.path.dirname(os.path.dirname(os.path.dirname(__file__))))

Number of repetitions of os.path.dirname depends on where is the file located your project hierarchy. For instance, in my case the project root is three levels up.