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 …
assert - How to handle AssertionError in Python and find out which line ...
Jul 21, 2012 · The traceback module and sys.exc_info are overkill for tracking down the source of an exception. That's all in the default traceback. So instead of calling exit(1), just re-raise: try: assert …
assert - What is the use of the "-O" flag for running Python? - Stack ...
Aug 25, 2022 · 48 Python can run scripts in optimized mode (python -O) which turns off debugs, removes assert statements, and IIRC it also removes docstrings. However, I have not seen it used. …
How to assert if the two possibly NaN values are equal
In my test case, I assume that if two values are NaN then they are equal. What is the way to express it using unittest assertions? The two common functions presented below are not handling this cas...
python - Assert a logger writes to stdout - Stack Overflow
Apr 25, 2025 · I'm trying to assert the fact that my loggers writes to stdout, but I can't get it to work. I ran the logger in a python file to make sure it outputs something in the standard output.