python 操作字符串

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"))

文章转载自:http://wangwei007.blog.51cto.com/68019/903426