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
"assert" statements are removed when the compilation is optimized. So, yes, there are both performance and functional differences. The current code generator emits no code for an assert …
python - "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 …
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, …
python - Que hace la función assert? - Stack Overflow en español
El assert es una instruccion de Python que te permite definir condiciones que deban cumplirse siempre. En caso que la expresion booleana sea True assert no hace nada y en caso de False dispara una …
python - How can I check if an object has an attribute? - Stack Overflow
Assert isn't considered safe in production code; it's tempting to write assert x<5 and then be very surprised when x is more than 5 and the software continues running because Python was run with …
assert - How to handle AssertionError in Python and find out which line ...
Jul 21, 2012 · Houston, we have a problem. Traceback (most recent call last): File "/tmp/poop.py", line 2, in <module> assert "birthday cake" == "ice cream cake", "I wanted pie" AssertionError: I wanted pie …
python - How do I properly assert that an exception gets raised in ...
I have to reiterate @Ctrl-C's comment: pytest.mark.xfail DOES NOT assert that an exception was raised, it simply allows it to be raised. This is not what the title of the question asks.
What are acceptable use-cases for python's `assert` statement?
Nov 22, 2016 · I often use python's assert statement to check user input and fail-fast if we're in a corrupt state. I'm aware that assert gets removed when python with the -o(optimized) flag. I personally don't r...