Python 常用字符串操作

Posted 侠岚之弋痕夕

tags:

篇首语:本文由小常识网(cha138.com)小编为大家整理,主要介绍了Python 常用字符串操作相关的知识,希望对你有一定的参考价值。

Python 字符串操作(string替换、删除、截取、复制、连接、比较、查找、包含、大小写转换、分割等)   
 
 
去空格及特殊符号  
s.strip() .lstrip() .rstrip(,)   
 
复制字符串  
#strcpy(sStr1,sStr)   
sStr= strcpy   
sStr = sStr  
sStr= strcpy   
print sStr   
 
连接字符串  
#strcat(sStr1,sStr)   
sStr= strcat   
sStr = append   
sStr+= sStr   
print sStr  
 
查找字符  
#strchr(sStr1,sStr)   
sStr= strchr   
sStr = s   
nPos = sStr1.index(sStr)   
print nPos   
 
比较字符串  
#strcmp(sStr1,sStr)   
sStr= strchr   
sStr = strch   
print cmp(sStr1,sStr)  
 
扫描字符串是否包含指定的字符  
#strspn(sStr1,sStr)   
sStr= 1345678   
sStr = 456   
#sStrand chars both in sStrand sStr   
print len(sStrand sStr)  
 
字符串长度  
#strlen(sStr1)   
sStr= strlen   
print len(sStr1)   
 
将字符串中的大小写转换  
#strlwr(sStr1)   
sStr= JCstrlwr   
sStr= sStr1.upper()   
#sStr= sStr1.lower()   
print sStr  
 
追加指定长度的字符串  
#strncat(sStr1,sStr,n)   
sStr= 1345   
sStr = abcdef   
n = 3 
sStr+= sStr[0:n]   
print sStr  
 
字符串指定长度比较  
#strncmp(sStr1,sStr,n)   
sStr= 1345   
sStr = 13bc   
n = 3 
print cmp(sStr1[0:n],sStr[0:n])   
 
复制指定长度的字符  
#strncpy(sStr1,sStr,n)   
sStr= ‘‘   
sStr = 1345   
n = 3 
sStr= sStr[0:n]   
print sStr  
 
将字符串前n个字符替换为指定的字符  
#strnset(sStr1,ch,n)   
sStr= 1345   
ch = r   
n = 3 
sStr= n * ch + sStr1[3:]   
print sStr  
 
扫描字符串  
#strpbrk(sStr1,sStr)   
sStr= cekjgdklab   
sStr = gka   
nPos = -1 
for c in sStr1:   
     if c in sStr:   
         nPos = sStr1.index(c)   
         break   
print nPos   
 
翻转字符串  
#strrev(sStr1)   
sStr= abcdefg   
sStr= sStr1[::-1]   
print sStr  
 
查找字符串  
#strstr(sStr1,sStr)   
sStr= abcdefg   
sStr = cde   
print sStr1.find(sStr)   
 
分割字符串  
#strtok(sStr1,sStr)   
sStr= ab,cde,fgh,ijk   
sStr = ,   
sStr= sStr1[sStr1.find(sStr) + 1:]   
print sStr  
 或者   
s = ab,cde,fgh,ijk   
print(s.split(,))   
 
连接字符串  
delimiter = ,   
mylist = [Brazil, Russia, India, China]   
print delimiter.join(mylist)   
PHP 中 addslashes 的实现  
def addslashes(s):   
     d = {":\\", "":"\\‘", "\0":"\\\0", "\\":"\\\\"}   
    return ‘‘.join(d.get(c, c) for c in s)   
s = "John ‘Johny‘ Doe (a.k.a. \"Super Joe\")\\\0"   
print s   
print addslashes(s)   
 
只显示字母与数字  
def OnlyCharNum(s,oth=‘‘):   
     s = s.lower();   
    fomart = abcdefghijklmnopqrstuvwxyz013456789   
    for c in s:   
        if not c in fomart:   
             s = s.replace(c,‘‘);   
     return s;   
print(OnlyStr("a000 aa-b"))   

来源:http://www.centoscn.com/python/2013/0807/1155.html

以上是关于Python 常用字符串操作的主要内容,如果未能解决你的问题,请参考以下文章

[Python]常用代码块

21个常用代码片段

python常用代码

记录C#常用的代码片段

初识python: 常用字符串操作

python常用操作之使用多个界定符(分隔符)分割字符串