# -*- coding: utf-8 -*- def your_range(start, stop=None, step=1): ''' 实现你自己的range函数 ''' if stop is None: start, stop = 0, start if step == 0: raise ValueError('step cannot be 0') result = [] i = start while i < stop: result.append(i) i += step return result print(your_range(8)) print(your_range(1, 8)) print(your_range(3, 8)) print(your_range(3, 8, 2)) print(your_range(-8, 0)) print(your_range(-8, 2)) print(your_range(-8, -2, 2)) '''运行结果 mouse@debian ~/python> python3 your_range.py [0, 1, 2, 3, 4, 5, 6, 7] [1, 2, 3, 4, 5, 6, 7] [3, 4, 5, 6, 7] [3, 5, 7] [-8, -7, -6, -5, -4, -3, -2, -1] [-8, -7, -6, -5, -4, -3, -2, -1, 0, 1] [-8, -6, -4] '''