Python shell automatically load changes

I really love python because I love interactive development. There's one area where python appears to fall short, however, and that's in the area of automatically reloading changed files. Basically, what I want to have happen is to be able to modify a python file on-disk and then have my running python instance automatically reload the changed module to allow me to immediately access my changes in the REPL so I can test them out. Basically, I want s开发者_运维百科ome sort of watch command.

I happen to use the bpython shell because I think it's the best one available, but this feature is so important to me that I'd be willing to switch to any other python shell that does it right. Is it possible?

Something like tail -f in python + reload().

I really think they should make the tags OS and Python version mandatory though.

If you're trying to "test out" your code, perhaps you should be looking into doing automated unit tests instead of testing your code repeatedly and manually. It'll allow you to test more code quicker and waste less of your precious, precious development time.

Personally, I use unittest with py.test as the runner.