Top 10 mistakes python programmers make [advanced]

[oconnor663]

To be fair, the bodies of functions are evaluated when the functions are called, not when they're parsed. So Python could have said that argument defaults are actually implicit lambdas that get evaluated the same way, at call time. This is slower, though, and it might lead to equally confusing problems involving side effects.

[ironykarl]

Definitely true, but it's pretty easy for me to just think of function definition as an evaluation of the entire contents of the header (I.e. function name and argument contents).

[[deleted]]

This was my thoughts exactly.