Importing from within package

[Dieter Maurer]

Abdur-Rahmaan Janhangeer wrote at 2020-9-23 22:41 +0400:
>In shopyo/shopyo (the same folder as __main__.py) there is a folder called
>shopyoapi.

Not in the distribution:
...
shopyo-1.1.45/shopyo/
shopyo-1.1.45/shopyo/__init__.py
shopyo-1.1.45/shopyo/__main__.py
shopyo-1.1.45/shopyo/app.py
shopyo-1.1.45/shopyo/config.py
shopyo-1.1.45/shopyo/manage.py
shopyo-1.1.45/shopyo/test_frontend.py
shopyo-1.1.45/shopyo.egg-info/
...

Maybe, that is your problem (missing folder in the distribution).