Couldn't install numpy on Python 2.7
Oscar Benjamin
oscar.j.benjamin at gmail.com
Wed Jun 12 18:44:41 EDT 2024
On Wed, 12 Jun 2024 at 23:11, Chris Angelico via Python-list
<python-list at python.org> wrote:
>
> On Thu, 13 Jun 2024 at 07:57, Oscar Benjamin via Python-list
> <python-list at python.org> wrote:
> > They are seeing a warning that explicitly says "You can upgrade to a
> > newer version of Python to solve this". I don't know whether that SSL
> > warning is directly connected to pip not finding any versions of numpy
> > but with the available information so far that seems like the first
> > thing to consider.
>
> I think it is; AIUI, with an ancient SSL library, pip is unable to
> download packages safely from the current pypi server. So if anyone
> actually does need to use pip with Python 2.7, they probably need to
> set up a local server, using older encryption protocols (which should
> therefore NOT be made accessible to the internet). Since pip can't
> contact the upstream pypi, there's no available numpy for it to
> install.
I don't know much about SSL and related networking things especially
on Windows. I would be surprised if pip on old Python can't install
from current PyPI though. I imagine that something strange has
happened like a new version of pip running on an old version of Python
or old Python on new OS (or old PyCharm...).
There is no problem using Python 2.7 with pip and PyPI on this Linux
machine but I guess it has a newer SSL library provided by the OS:
$ pip install numpy
DEPRECATION: Python 2.7 reached the end of its life on January 1st,
2020. Please upgrade your Python as Python 2.7 is no longer
maintained. pip 21.0 will drop support for Python 2.7 in January 2021.
More details about Python 2 support in pip can be found at
https://pip.pypa.io/en/latest/development/release-process/#python-2-support
pip 21.0 will remove support for this functionality.
Collecting numpy
Downloading numpy-1.16.6-cp27-cp27mu-manylinux1_x86_64.whl (17.0 MB)
|████████████████████████████████| 17.0 MB 14.3 MB/s
Installing collected packages: numpy
Successfully installed numpy-1.16.6
If it is actually the case that pip on Python 2.7 (on Windows) cannot
download from PyPI then an easier option rather than creating a local
server would just be to download the numpy wheels from PyPI using a
browser:
https://pypi.org/project/numpy/1.15.4/#files
Then you can do
pip install .\numpy-1.15.4-cp27-none-win_amd64.whl
Using a newer version of Python is still my primary suggestion though.
--
Oscar
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