无法从包中导入 Python 模块

Question

I have a package/module structure as follows:

root/
├ aa
│ └──bb
│    └──b.py
├ cc
│ └──bb
│    └──b.py

In IPython I'm trying to import b from aa.bb like so:

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

from aa.bb import b

But I am getting a ModuleNotFoundError

ModuleNotFoundError: No module named 'aa.bb'

Importing just aa works, as does importing cc.bb.b :

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

import aa
from cc.bb import b

What might be causing the module to be ignored, and how can I debug this? I suspect this is due to some mechanism at play in my IPython setup but don't know where to look.

Answer 1

have you tried using

import aa.bb.b

this has worked for me, or for a specific function in b.py you can use

from aa.bb.b import func

here is also a link to another stack overflow post about a similar topic: Importing files from different folder

Answer 2

It seems that a different aa module is being loaded on startup.

In a fresh shell you can check out the imported modules with sys.modules.keys() and find that aa is already there. You can see the source location using importlib :

importlib.util.find_spec('aa')
> ModuleSpec(name='aa', loader=<_frozen_importlib_external.SourceFileLoader object at 0x7f8f5c8dd0>, origin='/not/the/right/path/aa', submodule_search_locations=['/not/the/right/path/aa'])

You can reload the loaded module using importlib after ensuring a correct sys.path , which should load the target module:

import importlib                                                                                                                     
importlib.reload(aa)

from aa.bb import b