AIL
    Traceback (most recent call last):
    ...
    RuntimeError

    >>> def too_long(item_count):
    ...     print('The boss is going to hear about this')
    >>> it = strictly_n('abcdef', 4, too_long=too_long)
    >>> list(it)
    The boss is going to hear about this
    ['a', 'b', 'c', 'd']

Nc