BadZipfile "file is not a zip file"

[webcomm]

On Jan 9, 3:16 am, Steven D'Aprano <st... at REMOVE-THIS-
cybersource.com.au> wrote:
> The full signature of ZipFile is:
>
> ZipFile(file, mode="r", compression=ZIP_STORED, allowZip64=True)
>
> Try passing compression=zipfile.ZIP_DEFLATED and/or allowZip64=False and
> see if that makes any difference.

Those arguments didn't make a difference in my case.

> The zip format does support alternative compression methods, it's
> possible that this particular file uses a different sort of compression
> which Python doesn't deal with.
>
> > What would cause a zip file to not have a table of contents?
>
> What makes you think it doesn't have one?

Because when I search for the "file is not a zip file" error in
zipfile.py, there is a function that checks for a table of contents.
Tho it looks like there are other ideas in this thread about what
might cause that error... I'll keep reading...