Re: html5lib-1.1 build failure with Python 3.14

On Tue, 28 Oct 2025 23:13:37 +0100 "Stephen Berman" ([email protected] via blfs-dev Mailing List) <[email protected]> wrote:

> Building html5lib in current BLFS with Python 3.14 fails:
>
>  File "/sources/html5lib/html5lib-1.1/setup.py", line 93, in <module>
>       isinstance(a.value, ast.Str)):
>                               ^^^^^^^
>  AttributeError: module 'ast' has no attribute 'Str'
>
> This is because the 'Str' attribute was removed in 3.14
> <https://docs.python.org/dev/whatsnew/3.14.html#id2>.  There is a patch
> at <https://github.com/html5lib/html5lib-python/pull/589/files>, which
> AFAICT is not yet in a tagged version of html5lib.  From this patch I
> constructed the following two seds and with them could complete the
> build:
>
> sed -i 's/isinstance(a.value, ast.Str)):/isinstance(a.value, ast.Constant) and\
>                 isinstance(a.value.value, str)):/' setup.py
> sed -i 's/a.value.s/a.value.value/' setup.py 
>
> I added the space at the beginning of the second line of the first sed
> to get the right indentation.  My sed-foo is minimal so there's no doubt
> better alternatives, but this worked for me.

I just learned that this issue came up weeks ago in ticket #22244, so
sorry for the noise (I had searched before posting but somehow missed
this).

Steve Berman

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