Python 字符串操作

    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= ''
    sStr = ''
    #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= ''
    sStr = 'abcdef'
    n = 3
    sStr+= sStr[0:n]
    print sStr  

    字符串指定长度比较
    #strncmp(sStr1,sStr,n)
    sStr= ''
    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 = ''
    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= ''
    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"))