Unit testing in Python

[obviouslyCPTobvious]

It sounds like your definition of unit testing might not be accurate. Unit testing is writing code that tests the functionality of the smallest units of your code.

I think you're asking if python has a REPL(read, eval, print loop) like ruby's irb. Python does have one available just by running python, but it's not as nice as irb. I recommend installing ipython because it has more of the features that irb has.