Problems after upgrading from 4.0.1

[xlcnd]

After upgrading from 4.0.1 to 4.0.2, in some cases, isbntools stop work!

Solution

1. try pip uninstall isbntools (or sudo pip uninstall isbntools) and reinstall isbntools.
2. if the above doesn't work, try to see where python has installed isbntools and delete all files
   isbntools* and the directory isbntools. Reinstall isbntools again.

This should solve the problem :)