Pyinstaller .exe cannot find _tiffile module - Loading of some compressed images will be very slow

Question

When I run my code from Pyinstaller the tiff reader works fine. After freezing using Pyinstaller I get the following warning:

UserWarning: ImportErr         


        

Answer 1

I think muggy is right about he weirdness with __package__ causing the issue here. I haven't tracked down the exact reason for the fix, but this seems to be resolved using the latest update to pyinstaller. Check your version with:

→ pyinstaller --version 3.2.1

and upgrade with

→ pip3 install --upgrade pyinstaller

The update was only made on January 15, 2017 so this wouldn't have helped when you originally asked, but it sure helps now.