Change win32InstalledFonts return value - #12213

There is already #12174, however it did not add an api change entry.

Oh, didn't see #12174. The discussion there has gone a bit off-topic as well.

Anyway, we should add an API change note. While it's unlikely that someone will actually use that function and have a problem with the change, it's still a function that appears in the official docs.

Taking up the solution proposed by @Kojoley in #12173 (comment)

I don't know if this is allowed or not, I'm a complete novice when it comes to Python, and libraries, imports. What I can say is I had this problem, ended up here after having to do an environment reload which updated my matplotlib.

You guys are amazing, checked out the file update, made the modifications, back up and running.
Thank you for being such contributor to newbies like me. Thank you seriously.

The solution proposed by @Kojoley in #12173 did not solve the issue for me, I still get

 File "C:\Users\thisuser\AppData\Local\Programs\Python\Python35\lib\site-packages\matplotlib\font_manager.py", line 264, in findSystemFonts
    fontfiles.update(win32InstalledFonts(fontext=fontext))
TypeError: 'NoneType' object is not iterable

@sebbosafened Hm, I do not know how it is even possible to get a None value after the PR.

line 264

Please, check twice, the line number should be different.

I copied everything from your version of font_manager.py (

I copied everything from your version of font_manager.py (

matplotlib/lib/matplotlib/font_manager.py

Line 261 in deae70a

fontfiles.update(win32InstalledFonts(fontext=fontext))
) to my local font_manager.py (after backing up my local version that I had already edited - with obvious mistakes - according to yourt post @Kojoley on 23rd september, 00:16 CEST) and now it works. Thank you a lot.

Somehow the contents of font_manager.py have to be manually updated like what @sebbosafened did. I also managed to get it to work after updating my local version of font_manager.py to the version here. Thanks a lot for solving the problem 👍

I copied everything from your version of font_manager.py (
matplotlib/lib/matplotlib/font_manager.py
Line 261 in deae70a
fontfiles.update(win32InstalledFonts(fontext=fontext))
) to my local font_manager.py (after backing up my local version that I had already edited - with obvious mistakes - according to yourt post @Kojoley on 23rd september, 00:16 CEST) and now it works. Thank you a lot.

Somehow the contents of font_manager.py have to be manually updated like what @sebbosafened did. I also managed to get it to work after updating my local version of font_manager.py to the version here. Thanks a lot for solving the problem

I change "if sys.platform == 'win32:" to if sys.platform == 'win64': in matplotlib/lib/matplotlib/font_manager.py
It works.

I change "if sys.platform == 'win32:" to if sys.platform == 'win64': in matplotlib/lib/matplotlib/font_manager.py

It cannot has that value https://mail.python.org/pipermail/patches/2000-May/000648.html
https://github.com/python/cpython/blob/c510c6b8b60f211793e0b84c317ea6974e8a6153/PC/pyconfig.h#L297-L301

I copied everything from your version of font_manager.py (
matplotlib/lib/matplotlib/font_manager.py
Line 261 in deae70a
fontfiles.update(win32InstalledFonts(fontext=fontext))
) to my local font_manager.py (after backing up my local version that I had already edited - with obvious mistakes - according to yourt post @Kojoley on 23rd september, 00:16 CEST) and now it works. Thank you a lot.

Somehow the contents of font_manager.py have to be manually updated like what @sebbosafened did. I also managed to get it to work after updating my local version of font_manager.py to the version here. Thanks a lot for solving the problem

I change "if sys.platform == 'win32:" to if sys.platform == 'win64': in matplotlib/lib/matplotlib/font_manager.py
It works.

It works for me! Thanks a lot 🎉🎉🎉