AttributeError: module '__main__' has no attribute '__file__'

First, pip install cdsapi and could run the example .py properly.

Seconda, pip install cdstoolbox-remote, but get AttributeError: module '__main__' has no attribute '__file__'.

Then, I open the __init__.py in the cdstoolbox package.

The contents are:

import __main__
import cdsapi
import sys

c = cdsapi.Client()

with open(__main__.__file__) as f:
code = f.read()

print(c.download(c.workflow(code)))
sys.exit(0)

The AtrbuteError mentioned above is in the "with open(__main__.__file__) as f:"

Thank you