Comment by kungtotte

It would be trivial if the language lent itself to trivial solutions and there wasn't a culture of trying to anticipate and catch really messed up error cases that results largely from user errors.

In Python I would write ´if num > 0´, if it matters that it is an integer I would cast it to int, and that handles everything you should be handling at that level. If your user passes in a list instead of a number type, the code should crash because then there's probably an input error somewhere. If a user has monkeypatched a base class to make a number into something else the code should also fail and you deserve whatever happens to you.

Catching every possible error is a mistake.