Is there any side-effect of "cryptography==2.4.2" installation because of "CryptographyDeprecationWarning: Python 2" error?

Question

With docker-compose -f up -d have observed following error : /usr/local/lib/python2.7/dist-packages/cryptography/__init__.py:39: CryptographyDeprecationWarning: Python 2 is no longer supported by the Python core team. Support for it is now deprecated in cryptography, and will be removed in a future release.

As a workaround have tried

pip install cryptography==2.4.2

But will there be any side-effect of this installation or will there be any functionality which will not work?

Answer 1

Yes, there are a lot of features added between cryptography 2.4 and 3.0. They're all documented here: https://cryptography.io/en/latest/changelog/. If you are using binary wheels from PyPI then you'll also be missing many security fixes to OpenSSL.

Answer 2

this warning was added in cryptography 3.0:

Deprecated support for Python 2. At the time there is no time table for actually dropping support, however we strongly encourage all users to upgrade their Python, as Python 2 no longer receives support from the Python core team.

so no side effect for now