If you're looking for a full-featured IDE, I don't think you need to look any further than PyCharm, however, Sublime with it's PEP 8 Linter, and CodeIntel plugins will give you a lighter-weight yet effective solution.

You can even run your tests in Sublime's console if that's something you'd want to do, or use the terminal (as I ended up doing).

Similarly, for vim as people have pointed out, if that's something you're more comfortable with.

Sublime Text 3 is easy to use, provides core functionality needed for development, and is customizable.

https://realpython.com/blog/python/setting-up-sublime-text-3...

I've tried pretty much everything, and PyCharm has been the nicest, most productive set-up for me. It features a really nice integrated debugger, a test runner, dependency checking/management and really good code analysis/autocomplete/refactoring.

just vim, https://github.com/alfredodeza/khuno.vim and https://github.com/hynek/vim-python-pep8-indent

I tired vim, but I just find debugging so much easier on pycharm

And the reverse for me, its just the classic CLI vs GUI personal preference. Every time I touch the mouse in PyCharm, I cringe with the feeling of delay. Python since 2001 here, so there wasn't much GUI python until recently, perhaps I've fallen into a trap :)

Here is some video of myself programming some very boring stuff in python/vim, https://www.livecoding.tv/jquast/ which unfortunately looks like it requires anybody to login/signup to watch, probably won't be using this service again.

WingIDE from Wingware is really nice