unittest already has a lot of really helpful assertions - I just wish they were more accessible outside of a standard class-based tests. https://docs.python.org

unittest already has a lot of really helpful assertions - I just wish they were more accessible outside of a standard class-based tests. https://docs.python.org/3/library/unittest.html https://docs.python.org/3/library/unittest.html I tend to try and lean on the language as much as possible before pulling in libraries like this. This is the sort of thing that you end up regretting a year or two later when the author abandons the project and you can no longer get help for bugs. Unlike vanilla language assertions, you won't need to rewrite your entire test suite when that situation inevitably comes up. pytest will give you really awesome feedback with vanilla/basic 'assert x in y' statements