How To Assert Operators < And >= Are Not Implemented?

Initially I was not using the unittest framework, so to test that two objects of the same class are not comparable using the operators < and >= I did something like: try:

Solution 1:

Use assertRaises as a context manager:

with self.assertRaises(TypeError):
    o1 < o2

Here is an explanation of the with statement. Here are the docs. TL;DR: It allows the execution of a code block with a "context", i.e. things to be set up and disposed before/after the execution, error handling etc.

In the case of assertRaises, its context manager simply checks whether an execption of the required type has been raised, by checking the exc agrument passed to its __exit__ method.