[Python-Dev] Re: What to do about invalid escape sequences

07.08.19 01:37, Brett Cannon пише:

I think this is a good example of how the community is not running tests with warnings on and making sure that their code is warnings-free. This warning has existed for at least one full release and fixing it doesn't require some crazy work-around for backwards compatibility, and so this tells me people are simply either ignoring the warnings or they are not aware of them.

There are several PRs for fixing warnings on GitHub every month. And seems a deprecation warning about importing ABCs from collections is at least so common (if not more) as a warning about "invalid escape sequences". The former is more visible to end users because is emitted at every run, not only at the first bytecode compilation.