The Pillow library is installed for my Python environment my_proj still it is throwing the Error PIL module is not there.

The Pillow library is installed for my Python environment my_proj still it is throwing the Error PIL module is not there.

Please check your python actual path which you use currently I think in your system python is installed two or more times so your working python directory is different and pip has installed the package at another python directory.
I think python install with a default path like
===== In my case Python's defalt path is like this =====
C:\Users\Administrator\AppData\Local\Programs\Python\Python310
===== In your case Python's defalt path is like this =====
C:\Users\<Your Username>\AppData\Local\Programs\Python\Python310