Hello. astropy tests against the dev version of matplotlib by installing git+https://github.com/matplotlib/matplotlib.git#egg=matplotlib (see https://github.com/astropy/astropy/blob/13c4faa2ef41624f0f454f16ded57043c2b1c4ec/tox.ini#L84). Unfortunately, this gives a dev version that is hard to check.

Example log using latest stable: https://github.com/astropy/astropy/runs/1807399647?check_suite_focus=true (Matplotlib: 3.3.4)

Example log using dev: https://github.com/astropy/astropy/runs/1807399544?check_suite_focus=true (Matplotlib: 3.3.2+2259.g30546931d)

As a result, I am not sure how to check if a given Matplotlib version is dev or not:

>>> from packaging.version import Version
>>> stable = Version('3.3.4')
>>> dev = Version('3.3.2+2259.g30546931d')
>>> dev > stable  # Expected: True
False
>>> dev.is_devrelease  # Expected: True
False

Any advise would be really appreciated. Thanks!

xref astropy/astropy#11267