python3中的 range()内建函数产生是一个可迭代对象,它并不是列表,而是一个 range对象,返回的是结果是包含索引和值的索引
迭代对象'range' object is not an iterator
>>> range(1,5) #代表从1到5(不包含5)
[1, 2, 3, 4]
>>> range(1,5,2) #代表从1到5，间隔2(不包含5)
[1, 3]
>>> range(5) #代表从0到5(不包含5)
[0, 1, 2, 3, 4]>>> array[::2]
[1, 5, 6, 4]
>>> array[2::]
[5, 3, 6, 8, 4]
>>> array[::3]
[1, 3, 4]
>>> array[::4]
[1, 6] >>> array[::-1]
[4, 8, 6, 3, 5, 2, 1]
>>> array[::-2]
[4, 6, 5, 1]