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"))
Python 常用字符串操作
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