Re: Error installing matplotlib

On 03/09/2025 00:01, Mats Wichmann wrote:
> On 9/2/25 14:51, Rob Cliffe via Python-list wrote:
>>
> There are two roots here:
>
> (1) it's not finding a prebuilt wheel.  You can see that because it's 
> proposing to use the source distribution instead:
>
> > Collecting matplotlib
> >    Using cached matplotlib-3.10.6.tar.gz (34.8 MB)
>
> and so it, in the initial output.
I may be wrong, but I suspect that this is because I have attempted to 
do the install multiple times.  I.e. it didn't say this on the first run.
>
> (2) Although at this point all hope of success is often lost on 
> Windows, it's still going to try to compile things. It found gcc - 
> there are messages from g++ in the output. Last I know, Pybind11 only 
> builds with the Microsoft compiler because it uses msvc-specific types 
> which gcc does not know about.
>
> Since the matplotlib project definition provides wheels for Python 
> 3.13 on Windows (not just the main Python, but also the free-threaded 
> versions), you need to figure out why the resolver doesn't think 
> there's anything applicable available.
>
>
Thanks for your reply, Mats, but I'm still lost.
Best wishes
Rob Cliffe
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