The __version__ attribute disappeared from version 5.0.1 to version 5.1.1

[ribes4]

Describe the bug
Hi, I have been using Flask-SocketIO version 5.0.1 until today and when I queried the version with the __version__ attribute it returned the current version as follows:

>>> import flask_socketio
>>> flask_socketio.__version__
'5.0.1'

But after upgrading the package to version 5.1.1 this attribute has disappeared:

>>> import flask_socketio
>>> flask_socketio.__version__
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: module 'flask_socketio' has no attribute '__version__'

Expected behavior
It was expected that the attribute would remain, if it has been moved, is there any way to query it again?

Thanks!

[miguelgrinberg]

This attribute was never documented as a public attribute that applications can use. I have made some refactorings lately in the package and I don't really need it anymore.

[ribes4]

Thank you for your answer. Reading the PEP I have realized that this way of specifying the version became obsolete a few months ago (https://www.python.org/dev/peps/pep-0396/#pep-rejection).

And that a good way to check the version is using for example the importlib library. I write here the way to check the version, for future users:

For Python versions >=3.8:

>>> from importlib.metadata import version  
>>> version('flask_socketio')  
'5.1.1'

And for previous Python versions:

>>> from importlib_metadata import version
>>> version('flask_socketio')
'5.1.1'

[miguelgrinberg]

Oh, I didn't know that one!

I have always used pkg_resources as follows:

>>> import pkg_resources
>>> pkg_resources.get_distribution("flask_socketio").version
'5.1.1'