python高级特性之切片

print(list(range(5,100))[0:10])   #取前十个数
print(list(range(5,100))[-1:])    #取最后一个数
print(list(range(5,100))[0:10:2]) #取前十个数，每两个取一个
print(list(range(5,100))[:])      #啥都不写全输出
#tuple也是一种list，唯一区别是tuple不可变。因此，tuple也可以用切片操作，只是操作的结果仍是tuple
print((0, 1, 2, 3, 4, 5)[:3])
#字符串'xxx'也可以看成是一种list，每个元素就是一个字符。因此，字符串也可以用切片操作，只是操作结果仍是字符串
print('ABCDEFG'[:3])
print('ABCDEFG'[::2])

结果：

[5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
[99]
[5, 7, 9, 11, 13]
[5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60,
61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99]
(0, 1, 2)
ABC
ACEG