importing within the same package

[justdanyul]

Say I have the following directory structure

- package_name
  - module1.py
  - module2.py
- docs/
  - index.md
mkdocs.yml

and i have

... snip ...
plugins:
  - search
  - mkapi:
      src_dirs: [package]

in my mkdocs.yml. And say we have two classes, ClassFirst in module1.py and ClassSecond in module2.py, if I now add docstrings to ClassFirst and do mkdocs build, everything works and my documentation is generated.

Actual problem
If i now where to import ClassSecond into module1.py , everything breaks. It doesn't matter if I use

from package_name.module2 import ClassSecond  

or

from .module2 import ClassSecond  

I import different from other modules within the same package all the time, doesn't mkapi support this?