#An iterable is any Python object capable of returning its members one at a time, permitting it to be iterated over in a for-loop. Familiar examples of iterables include lists, tuples, and strings - any such sequence can be iterated over in a for-loop.

Our encounter with for-loops introduced the term iterable - an object that can be “iterated over”, such as in a for-loop. Definition: An iterable is any Python object capable of returning its members one at a time, permitting it to be iterated over in a for-loop.

An iterable is any data structure that lets us access its elements.

Some built in examples are: strings, arrays, maps and sets.

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An iterator is an object that has the ability to access items 

from its collection one at a time and keep track of the current position.

def all(iterable):

    for element in iterable:

        if not element:

            return False

    return True