extended_range.py

def range(*args):
    def inner(start=0, stop=..., step=1):
        if stop is ...:
            stop = float('inf')
        while start < stop:
            yield start
            start += step
    if len(args) == 1:
        return inner(stop=args[0])
    else:
        return inner(*args)


>>> list(range(10))
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> list(range(10, 20))


[10, 11, 12, 13, 14, 15, 16, 17, 18, 19]
>>> list(range(10, 20, 4))
[10, 14, 18]
>>> list(zip(range(20), range(1, ..., 2)))
[(0, 1), (1, 3), (2, 5), (3, 7), (4, 9), (5, 11), (6, 13), (7, 15), (8, 17), (9,
 19), (10, 21), (11, 23), (12, 25), (13, 27), (14, 29), (15, 31), (16, 33), (17,
 35), (18, 37), (19, 39)]
>>>