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Title: Python 3.9rc2 fails to install matplotlib
Type: resource usage Stage: resolved
Components: Installation Versions: Python 3.9
Status: closed Resolution: third party
Dependencies: Superseder:
Assigned To: Nosy List: hugovk, kapil.sinha, ullix
Priority: normal Keywords:

Created on 2020-10-03 07:49 by ullix, last changed 2022-04-11 14:59 by admin. This issue is now closed.

Messages (4)
msg377859 - (view) Author: ullix (ullix) Date: 2020-10-03 07:49
Installing matplotlib via: python3 -m pip install -U matplotlib
fails because kiwisolver cannot be installed. Among a lot of error output is: WARNING: The wheel package is not available.

Not having matplotlib is a MAJOR hurdle for many!

Sstem: Ubuntu 16.04 with Python 3.9rc2 installed from deadsnakes repository (
msg378025 - (view) Author: Hugo van Kemenade (hugovk) * (Python triager) Date: 2020-10-05 13:10
This probably isn't an issue with CPython 3.9.0 itself, but rather third-party libraries needing to add 3.9 support and provide wheels, and they may be waiting for 3.9.0 to be officially released (due out today!).

Here's a PR to add Python 3.9 support to Kiwi (aka kiwisolver):
msg378042 - (view) Author: ullix (ullix) Date: 2020-10-05 15:51
I guess so. Just didn't know how else to bring this to someone's attention, thanks.

But not having matplotlib? Ohmygod!
msg378566 - (view) Author: Kapil Sinha (kapil.sinha) Date: 2020-10-13 15:41
It still fails. its two weeks after it was first reported. matplotlib is the reason I installed python. I guess I will rollback to older versions one by one to find which one works.
Date User Action Args
2022-04-11 14:59:36adminsetgithub: 86083
2020-10-13 15:41:02kapil.sinhasetnosy: + kapil.sinha
messages: + msg378566
2020-10-07 22:25:16steve.dowersetstatus: open -> closed
resolution: third party
stage: resolved
2020-10-05 15:51:36ullixsetmessages: + msg378042
2020-10-05 13:10:49hugovksetnosy: + hugovk
messages: + msg378025
2020-10-03 07:49:25ullixcreate