学习笔记(13):600 分钟搞定 Python 入门到实战-案例

立即学习:https://edu.csdn.net/course/play/26676/338783?utm_source=blogtoedu

‘a'.islower() 判断字符是否是小写

'a'.upper() 将字母改成大写

'A'.lower() 将字母改成小写

str = (1, 2, 3, 4,5,6,7,8,9)

>>> str[1:10:2]
(2, 4, 6, 8)

>>> str[11:-10:-2]
(9, 7, 5, 3, 1)

>>> str[0:4]
(1, 2, 3, 4)

>>> str[3:-10:-1]
(4, 3, 2, 1)