Fix ValueError: invalid mode: 'rUb'

[mikomuto]

File mode U is deprecated in Python 3 https://docs.python.org/3/library/functions.html#open

[mikomuto]

Full error generated with Python 3.11:

E:\GOG Games>gogrepo.py update
13:06:14 | loading local manifest...
13:06:14 | fatal...
Traceback (most recent call last):
File "E:\GOG Games\gogrepo.py", line 1170, in
main(process_argv(sys.argv))
File "E:\GOG Games\gogrepo.py", line 1145, in main
cmd_update(args.os, args.lang, args.skipknown, args.updateonly, args.id)
File "E:\GOG Games\gogrepo.py", line 607, in cmd_update
gamesdb = load_manifest()
^^^^^^^^^^^^^^^
File "E:\GOG Games\gogrepo.py", line 257, in load_manifest
with codecs.open(MANIFEST_FILENAME, 'rU', 'utf-8') as r:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "", line 906, in open
ValueError: invalid mode: 'rUb'

[eddie3]

Thanks. Will fix this.

[WisdomCode]

Just as a quick fix for anyone having this problem, at least on linux systems, find the line and replace 'rU' with 'r' (simply remove the U), and it should work again.
On other OSses, the keyword newline might be necessary (something like
codecs.open(MANIFEST_FILENAME, 'r', 'utf-8', newline="\r\n") as r: may be needed in windows, untested!)

[kristroy]

Just tried the fix from @WisdomCode on my Windows10 system and found that removing the U was enough; adding a newline argument returned TypeError: open() got an unexpected keyword argument 'newline'. Hope this helps!

[pchristod]

Worked for me as well on Windows, thanks!