The built-in functions working with iterable should also work with single object that is relevent.

For example:
max([1,6,5]) -> 6
max(6) -> TypeError because not an iterable (actual behavior)
max(6) -> 6 (wanted pythonic behavior)

So if I write a generic function like this:

def f(x):
    totalsum+=sum(x)

it fails if x is not an iterable. But I want the argument to be anything possible. Using if(type) to separate use cases is not very pythonic.