python字符串方法

 

  • 1,center()
s1 = "wangs"
s2 = s1.center(15,'*')
print (s2)
s3 = len(s2)
print(s3)


*****wangs*****
15

  


  • 2、 count()
s4 = "a is b are isaisa c"
ll =  len(s4)
print(ll)
s5 = s4.count('is')
print(s5)


19
3

  • 3  endswith()

 

s1 = "abc"
s2 = s1.endswith('c')
print(s2)

True

  

  

  • 4、expandtabs()    把tab键换成空格 ,可以自定义多少个空格
s1 = "hhh\tjjj"
print(s1.expandtabs(20))


hhh                 jjj

  

 
  • 5 find() 找符合的字符,返回找到的字符所在的位置

  

s1 = "ab is are"
s2 = print(s1.find('a'))

0

  

  • 6、format 字符串的格式化
s1 = "hello {0},age {1}"
print(s1)
new1=s1.format("aaa",19)
print (new1)


hello {0},age {1}
hello aaa,age 19

  

  • 7、isaloha 判断是不是全是字母

  

s1 = "88d88 "
print(s1.isalpha())


False

  

  • 8、 join 元素之间的分隔符是S
s1 = "wang"
li = ["aaa","bbb"]
print('S'.join(s1))
print(''.join(s1))
print(''.join(li))


wSaSnSg
wang
aaabbb

  

  • 9 ljust 内容左边对齐 右边用 填充
  • 10、####lstrip 移除左边的空格
s1 = " www 22 "
print(s1.lstrip())


www 22

  

  • 11、去掉右边的空格
s1 = " www 22 "
print(s1.rstrip())


 www 22

  

  • 12、####去掉左边和右边的空格 中间的 去不掉
s1 = " www 22 "
print(s1.strip())


www 22

  

  • 13、partition 分割字符 用传参来分割成元祖类型 

  

s1 = "ab is aa 3 fs "
print(s1.partition('is')


('ab ', 'is', ' aa 3 fs ')

  

  • 14、替换字符

  

s1 = "ab is aa"
print (s1.replace('ab','xxx'))


xxx is aa

  

  • 15、##split 按照 什么来分割字符
s1 = "abisaaandandin"
s2 = "aa\nbb\nadm"
print(s1.split('and'))
print(s2.split('\n'))


['abisaa', '', 'in']
['aa', 'bb', 'adm']

  

  • 16、## 大写变小写 小写变大写

  

s1 = "abdS"
print (s1.swapcase())


ABDs

  

posted on 2020-04-04 21:38  现实不似你所见  阅读(149)  评论(0编辑  收藏  举报