Python 字符串的的调用方法~~~
废话不多说直接奔主题 >>>>>>>>>>>>>>>>>
1. isupper : 判断字符串是否全部是大写
![](https://img2018.cnblogs.com/blog/1660900/201904/1660900-20190417202234696-399777048.png)
2. isdigit :判断是否是整型
![](https://img2018.cnblogs.com/blog/1660900/201904/1660900-20190417202440034-325035412.png)
3. upper : 把字符串全部变成大写
![](https://img2018.cnblogs.com/blog/1660900/201904/1660900-20190417202613363-1478603513.png)
4. islower : 判断字符串是否为全部小写
![](https://img2018.cnblogs.com/blog/1660900/201904/1660900-20190417202748736-291732572.png)
5 . startswith : 判断字符串中开头是否为“ ”
![](https://img2018.cnblogs.com/blog/1660900/201904/1660900-20190417202931754-138188277.png)
6. endswith : 判断字符串中结尾是否为“ ”
![](https://img2018.cnblogs.com/blog/1660900/201904/1660900-20190417203048700-75362946.png)
7. index : 取字符串 “ ” 的下标。(如果没有这个字符会报错)
![](https://img2018.cnblogs.com/blog/1660900/201904/1660900-20190417203223260-774039924.png)
8. find : 取字符串“ ” 的下标。 (如果没有这个字符会返回值 -1 )
![](https://img2018.cnblogs.com/blog/1660900/201904/1660900-20190417203320184-1574690033.png)
9. isalpha : 判断是否全部都是英文或汉字
![](https://img2018.cnblogs.com/blog/1660900/201904/1660900-20190417203743779-326691874.png)
10. count : 统计字符串里的某个字符的个数
![](https://img2018.cnblogs.com/blog/1660900/201904/1660900-20190417203848301-644728172.png)
11. istitle : 判断字符串中是否是抬头
![](https://img2018.cnblogs.com/blog/1660900/201904/1660900-20190417203936450-698708388.png)
12. title : 把一个字符串变成抬头
![](https://img2018.cnblogs.com/blog/1660900/201904/1660900-20190417204022947-86518295.png)
13. isspace : 判断字符串是否为纯空格
![](https://img2018.cnblogs.com/blog/1660900/201904/1660900-20190417204126795-1800518828.png)
14. replace : 替换
![](https://img2018.cnblogs.com/blog/1660900/201904/1660900-20190417204221837-1476874770.png)
15. join : 把一个可迭代对象变成字符串(列表,元组,集合,字典,字符串)
![](https://img2018.cnblogs.com/blog/1660900/201904/1660900-20190417204347759-136890501.png)
16 . split : 把一个字符串变成列表
![](https://img2018.cnblogs.com/blog/1660900/201904/1660900-20190417204508958-812929486.png)
17 . rsplit : 把一个字符串变成列表
![](https://img2018.cnblogs.com/blog/1660900/201904/1660900-20190417204556666-1329585838.png)