ValueError: substring not found

[Shirobaka]

This error appears after downloading the images:

Traceback (most recent call last):
  File ".\tapas-dl.py", line 164, in <module>
    pageData['id'], img[img.rindex('.') + 1:]), fat=args.restrict_characters)), 'wb') as f:
ValueError: substring not found

OS: Windows 10 and Linux

[Ruthalas]

The proposed fix is good. Can we merge/incorporate it?

[TilCreator]

I will message naive-salt to create a merge request

[TilCreator]

The interface was a bit confusing, but this should do it.