Comment by ActorNightly

I dunno what issues you are running into, but generally, code from old Python should work fine under new releases if you are developing, you just have to set up your venv right up front and install the specific version of libraries that don't have modern Python code.

I still work on projects that were written under 3.6.

If you care enough, you can also use something like asdf to install an older Python alongside the system one.