Re: Error installing matplotlib

On Wed, 3 Sep 2025, 15:40 Rob Cliffe, <[email protected]> wrote:

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> On 03/09/2025 15:35, Oscar Benjamin wrote:
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>
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> On Wed, 3 Sep 2025, 15:21 Rob Cliffe via Python-list, <
> [email protected]> wrote:
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>>
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>> On 03/09/2025 14:59, Mats Wichmann wrote:
>> > On 9/3/25 07:20, Rob Cliffe wrote:
>> >>
>> >>
>> >> On 03/09/2025 00:01, Mats Wichmann wrote:
>> >>> On 9/2/25 14:51, Rob Cliffe via Python-list wrote:
>> >
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> >
>> > # do a test install with some flags that *might* give you useful info:
>> > pip -v install --dry-run --only-binary :all: --ignore-installed
>> matplotlib
>> I'm not familiar with these pip options, but I tried this and got the
>> following output:
>>
>> Using pip 25.2 from C:\Python313\Lib\site-packages\pip (python 3.13)
>> ERROR: Could not find a version that satisfies the requirement
>> matplotlib (from versions: none)
>> ERROR: No matching distribution found for matplotlib
>
>
> This means that pip can't find matching wheels. You would see this error
> message at the end if you didn't have a network connection. Assuming pip
> can reach pypi then it thinks that none of these wheels is suitable:
>
> https://pypi.org/project/matplotlib/#files
>
> There seem to be wheels for 3.13 on Windows for amd64 and arm64.
>
> Is it possible that you are on a 32 bit machine or using a 32 bit build of
> python?
>
> --
> Oscar
>
> I'm using a 32-bit build of python:
>
> >python
> Python 3.13.3 (tags/v3.13.3:6280bb5, Apr  8 2025, 14:32:59) [MSC v.1943 32
> bit (Intel)] on win32
>

Then the problem is that matplotlib no longer provides prebuilt wheels for
32 bit python on windows. The simplest fix is to install a 64 bit build of
python.

Oscar

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