Python 字符串操作

基础操作字符串如下:

In [10]: sStr="Action {speak}\t louder than {words}"

 

首字母大写

In [12]: print(sStr.capitalize())
Action {speak}   louder than {words}

 

查找字符，下标从 0 开始:

In [13]: print(sStr.index('louder'))
16
In [14]: print(sStr.index('c'))
1

 

字符串切片操作,通过find:

In [38]: print(sStr[sStr.find("th"):])
than {words}　

　　

清除字符串两端字符:

In [33]: print("\r \r\r\r \n Action Speack".strip("\r\n\t "))
Action Speack

 

是否是数字:

In [26]: print("123".isdigit())
True

 

从左往右填充字符:

In [24]: print(sStr.ljust(100,"*"))
Action {speak}   louder than {words}********************************************
*********************

 

以什么字符结尾:

In [23]: print("action speak louder".endswith("der"))
True

列表连接字符串:

In [18]: list=["action","speak","louder"]
In [19]: print(' '.join(list))
action speak louder

　tab键扩展:

In [15]: print(sStr.expandtabs(50))
Action {speak}                                     louder than {words}

In [16]: print(sStr.expandtabs(tabsize=50))
Action {speak}                                     louder than {words}

 查看某个字符或者sub字符串在字符串出现的次数:

In [43]: print("str.count",sStr.count('o'))
str.count 3

如果字符串至少有一个字符并且所有字符都是字母则返回 True, 否则返回 False

In [44]: print(sStr.isalpha())
False

In [45]: print("abc".isalpha())
True