"No such file or directory" run.py

[Mike2023a]

Hello all. Can someone please help me ?
I keep getting this error message "PS C:\Users\micha\BookGPT> python run.py.
C:\Users\micha\AppData\Local\Programs\Python\Python311\python.exe: can't open file 'C:\Users\micha\BookGPT\run.py': [Errno 2] No such file or directory
PS C:\Users\micha\BookGPT> " . I cannot start the program.

The file run.py is not in the src folder !

The above error is gone. Now there is a new error
PS C:\Users\micha\BookGPT> python run.py
Traceback (most recent call last):
File "C:\Users\micha\BookGPT\run.py", line 3, in
from book import Book
ModuleNotFoundError: No module named 'book'.
I had to install an older version of Plython.

Hope someone can help me ? I appreciate it very much.

Thanks a lot and all the best
Greetings Michael