On 2020-10-08 17:28, Mats Wichmann wrote:
On 10/7/20 2:00 AM, rebecca kahn wrote:
Good morning.
I need to install numpy and matplotlib for school. But everytime I run the
comand i get a error on the metadata fase. Can you offer assistance?
Sincerely Rebecca Kahn
Microsoft Windows [Version 10.0.18362.1082]
(c) 2019 Microsoft Corporation. Todos os direitos reservados.
C:\Users\Acer>python -m pip install numpy
Collecting numpy
Using cached numpy-1.19.2.zip (7.3 MB)
Installing build dependencies ... done
Getting requirements to build wheel ... done
Preparing wheel metadata ... error
ERROR: Command errored out with exit status 1:
Short answer: be patient.
The root of this problem is Python 3.9 was *just* released, and some
(many?) of the packages on PyPI that include version-specific wheels
have not been updated yet.
Use a Python 3.8 version if you're in a hurry. There is a site that has
unofficial builds of many interesting packages for Windows, but
personally I'm a little reluctant to point people there, as they're
unsupported if there are problems.
You can check the numpy status, as for any package on PyPI by searching
it and going to the list of downloadable files. Here:
https://pypi.org/project/numpy/#files
Slightly longer description - why you see lots of scary error messages -
is since pip doesn't find an appropriate wheel, it embarks on the
process of building one from the source distribution. This nearly
always fails for the ordinary Windows user, since the required build
setup will not be present, complete, or configured. The errors come
from this, but that's only because the per-built wheel was not found.
(this happens every time a new Python version, that is X in 3.X comes out)
It's always worth looking at Christoph Gohlke's site:
https://www.lfd.uci.edu/~gohlke/pythonlibs/
Yes, it does have numpy and matplotlib.
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