Python 常用字符串操作

来源：互联网   发布日期：2015-08-20 22:23:02   浏览：2142次  

Python 字符串操作（string替换、删除、截娶复制、连接、比较、查找、包含、大小写转换、分割等）

Python 字符串操作（string替换、删除、截娶复制、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"))

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