group_iterator.py

def iterate(iterable, n):
    first = []
    for second in iterable:
        first.append(second)
        if len(first) == n:
            yield first
            first.pop(0)
    yield first

def main():
    for element in iterate(["a", 45, None, 0, (4,5), [1]], 4):
        print(element)

main()