Re: errors when updating syntax

[Jean Abou Samra]

Le 30/01/2021 à 08:08, James B. Wilkinson a écrit :
> MacBook Pro Mavericks. I picked "Update Syntax" from the Lilypond Compile menu. 
> I added a line of code in the offending file asking it to print the Python version. It’s 
> 2.6.6 and was created by Apple.
>
> Just now I ran this:
>
> /Applications/LilyPond.app/Contents/Resources/bin/convert-ly chloris.ly and 
> redirected the output into a file. Worked like a champ, and changed the version 
> in the file to 2.22. Opened that file in lily pond and compiled it; also worked 
> like a champ.
>
> So I tried putting the python3 shebang line at the beginning of convert-ly.py 
> but discovered that it’s already there. Then I tried putting it in the file 
> lilylib.py that actually threw the error. It wasn’t already there, but adding 
> it did not fix anything. Somehow the decision to use the Apple 2.6.6 has been 
> made before it starts to read convert-ly.py, and nothing is going to change its 
> mind about that.
>
> I’ll go send this to the bug list right now.
Thanks!
> As a slightly related aside, can somebody point me to an explanation of the 
> line of code that is cited in the error message?
>
> sys.stdin = codecs.getreader('utf8')(sys.stdin.detach())
>
> My Python skills don’t reach far far enough to grok that syntax.      thanks

It forces the standard input stream to be
read in UTF-8 encoding. See
https://stackoverflow.com/a/4374457

Best,
Jean