Pip install of py7zip does not result in working code

[VivitionDeveloper]

When installing py7zip in your venv with (I'm using 0.6.2)

pip install py7z

then the following piece of code (I'm using a Jupyter ipynb file) raises an error

import py7zip
z = py7zip.Py7zip()

the error raised is:

AttributeError: module 'py7zip' has no attribute 'Py7zip'

As I'm not very well known with Python, compared with other modules, I saw that init.py was empty. Or either I'm making a mistake, but I just followed the provided documentation. I expected therefore that this piece of code should run without problems.