Add a __version__ attribute to the package

[tmke8]

Everyone has this.

[tmke8]

Apparently, you can do it this way:

from importlib import metadata
import toml

try:
    __version__ = metadata.version(__package__)
except metadata.PackageNotFoundError:
    __version__ = toml.load("pyproject.toml")["tool"]["poetry"]["version"] + "dev"

source: python-poetry/poetry#144 (comment)

[tmke8]

There is a backport of importlib.metadata for Python 3.7 here: https://github.com/python/importlib_metadata

With that, the above simplifies to

from importlib import metadata
 __version__ = metadata.version(__package__)

[tmke8]

I wanted to use this for sphinx, but I realized that that is a bad idea because sphinx is always run on the main branch, which obviously doesn't have the right version.

[tmke8]

I don't think this is needed anymore. The docs now show the correct version, and if someone wants to know the version of EthicML, they can use importlib.metadata.