What is the use of "assert" in Python? - Stack Overflow
Feb 28, 2011 · Python’s assert statement is a debugging aid, not a mechanism for handling run-time errors. The goal of using assertions is to let developers find the likely root cause of a bug more quickly.
python - Best practice for using assert? - Stack Overflow
For example, if you're writing a function to read from a configuration file into a dict, improper formatting in the file should raise a ConfigurationSyntaxError, while you can assert that you're not about to return …
Proper way to assert type of variable in Python - Stack Overflow
Sep 5, 2012 · Note that Unicode strings which only contain ASCII will fail if checking types in this way, so you may want to do something like assert type(s) in (str, unicode) or assert isinstance(obj, …
"assert" statement with or without parentheses - Stack Overflow
I share your annoyance that the python assert has unique syntax relative to all other python programming constructs, and this syntax has yet again changed from python2 to python3 and again …
python - What's the difference between raise, try, and assert? - Stack ...
Nov 22, 2025 · 108 I have been learning Python and the raise function* and assert are really similar (what I realised is that both of them crash the app, unlike try - except) and I can't see a situation …
Assert that a method was called in a Python unit test
Caveat emptor! (Buyer beware!) If you mistype assert_called_with (to assert_called_once or just swap two letters assert_called_wiht) your test may still run, as Mock will think this is a mocked function and …
Python function to assert a type and cast - Stack Overflow
Jun 27, 2024 · Python function to assert a type and cast Asked 1 year, 7 months ago Modified 1 year, 7 months ago Viewed 528 times
python - Checking whether function has been called multiple times …
function.assert_has_calls([mock.call(1, 2), mock.call(2, 3)]) Where mock.call is a helper class do to these kind of jobs. Pay attention that is a has call and means the call list should be in the list of call …
test a function called twice in python - Stack Overflow
This method will still pass even if mock_call_me has been called more than twice. If you'd like to assert parameters and number of calls, make sure to also validate call-count using …
How do you test that a Python function throws an exception?
Sep 25, 2008 · On Python < 2.7 this construct is useful for checking for specific values in the expected exception. The unittest function assertRaises only checks if an exception was raised.