I encountered this problem writing tests.

How to test that the exception ZeroDivisionError gets raised in the function:

def foo():
    try:
        res = 1/0
    except ZeroDivisionError:
        pass

This is an example modeling more complex use cases where the exception could be raised by some argument/external reasons but needs to be handled by the code.

import pytest

def test_foo():
    with pytest.raises(ZeroDivisionError):
        foo()

this does not work because the exception is handled by the except clause and not re-raised.