去除字符串两端的空格和字符

 1 # -*- coding: utf-8 -*-
 2 """
 3  去除字符串两端的空格和字符
 4  lstrip（）、rstrip（）、strip（）
 5  返回字符串的拷贝
 6 """
 7 x = ‘   aaa   ‘
 8 
 9 print ‘|‘,x.lstrip(),‘|‘,x.rstrip(),‘|‘,x.strip(),‘|‘
10 # Output: | aaa    |    aaa | aaa |
11 
12 x = ‘xyxxyy hejyx yyx‘
13 print ‘|‘+ x.strip(‘xy‘)+‘|‘
14 # Output：| hejyx |
15 
16 x = ‘yxyxyxyxyxyx   yyxyxyxyx‘
17 print x.lstrip(‘xy‘)
18 # Output：   yyxyxyxyx
19 
20 print x.rstrip(‘xy‘)
21 # Output: yxyxyxyxyxyx
22 
23 x = ‘xyyyyyxyxyxyxx‘
24 print x.lstrip(‘xy‘)
25 # Output：为空
26 
27 print x.rstrip(‘xy‘)
28 # Output：为空