Question

I’m trying to use thanos, which creates an extension module at runtime. Thanos is constantly failing as it cannot import that said extension it created at runtime.

I am baffled as to why this is the case.

At runtime (after compilation) the "cutils_ext" dir contains cutils_ext.so

import cutils_ext works, but import cutils_ext.cutils_ext fails with

ImportError: No module named cutils_ext

I’ve tested with with imp directly. Say that cutils is the imported cutils_ext package.
When I do:

imp.find_module('cutils_ext', cutils.__path__)

I again get the :

ImportError: No module named cutils_ext

I am completely baffled. Is there any way to debug this? I cannot run python in verbose mode due to my inability to start the python interpreter (using picloud), but if I could enable verbose at runtime, that would help (haven’t figured out how to do that).

Answer 1

could you try:

import cutils_ext
import cutils_ext.cutils_ext

I don’t know why, but sometimes I also have to import a module in order to import the sub modules in it.

Or maybe, just maybe, the second cutils_ext doesn’t exist at all in the first cutils_ext?

EDIT:
Wait a minute.. could you please post your folder structure and what the PYTHONPATH is containing?

I guess you have something like:

upper_folder (a folder)
    cutils_ext (folder)
        __init__.py (file)
        cutils_ext.so (obviously file)

if your PYTHONPATH points to upper_folder then you should be able to do what you have posted Note that if you have this situation the __ init __.py must be there.

If however your PYTHONPATH is pointing directly to the cutils_ext folder, then I supposed you can only import the file, so cutils_ext.cutils_ext doesn’t make sense for the interpreter (unless you have a variable called cutils_ext in cutil_ext.so…)