For Matplotlib we are going with 3 years worth of python versions ( https://matplotlib.org/devdocs/devel/min_dep_policy.html ) which seems like a reasonable compromise between keeping the library up-to-date and keep users stuck on old(er) versions of python able to access master. We also thought about "last 2 versions of python" but if you plan to release near a python release date things get a bit dicey planning wise. Tom On Tue, Jun 26, 2018 at 9:18 PM Juan Nunez-Iglesias <jni@fastmail.com> wrote:

On Wed, Jun 27, 2018, at 9:03 AM, Stefan van der Walt wrote:

...

$ pypinfo skimage pyversion

pypinfo! Awesome!

...

| python_version | download_count | | -------------- | -------------- | | 3.6 | 3,172 | | 2.7 | 1,995 | | 3.5 | 1,866 | | 3.4 | 118 | | None | 85 | | 3.7 | 18 |

It looks like 3.5 currently makes up about 37% of Python 3 installs. This number should come down over the next few months, but I suggest we keep supporting 3.5 for at least one more release.

Another way of looking at these numbers is that 3.5 makes up a smaller proportion than 2.7, which we are now supporting only via the LTS. ;) But I am being facetious. The sum of 2.7 and 3.5 is more than 3.6. It would be bad to only support a minority of our users in master.

Thanks for the info! I agree, let's wait until one month after 0.15 and check the stats again at that point.

Juan.

...

Ok so I looked at the command and thought, hmm, should that be scikit-image? After 30 painful minutes of setting up my own bigquery credentials:

pypinfo scikit-image pyversion

| python_version | download_count | | -------------- | -------------- | | 2.7 | 61,274 | | 3.6 | 23,767 | | 3.5 | 20,466 | | None | 3,693 | | 3.4 | 1,048 | | 3.7 | 81 | | 3.3 | 3 | | 2.6 | 2 | | 3.2 | 1 |

This comes with all the caveats of tracking PyPI downloads (most are from CI etc), but nevertheless: yes, let's keep 3.5 around. And let's make good on our LTS promise. =) _______________________________________________ scikit-image mailing list scikit-image@python.org https://mail.python.org/mailman/listinfo/scikit-image