Needs input: Disable strict mode for PdfFileReader

[dreua]

With strict = False exporting certain pdf files (e.g. #54) works.
Warnings are printed to stdout so they can be easily missed and are not visible at all when the application is not started from a command line.

[jeromerobert]

Shouldn't we investigate the warndest and/or overwriteWarnings parameters to have those warnings into a pop up dialog ? Of course this would only be reasonable if there are not too many of them.

[dreua]

Yes, I'm on that, but either it's not that straightforward or it's broken.

[jeromerobert]

It's broken. https://github.com/mstamy2/PyPDF2/blob/master/PyPDF2/pdf.py#L1129 change the default argument but this default argument is never used. The warnings python module always call showwarning with file=None. Anyway a library which modify the default of another library is a violation of many programming rules. I will try an other way.