python 字符串删除

   Whitespace stripping
 s = ' hello world \n'
 s.strip()
 'hello world'
 s.lstrip()
 'hello world \n'
 s.rstrip()
 ' hello world'
 
 
 

   Character stripping
 t = '-----hello====='
 t.lstrip('-')
 'hello====='
 t.strip('-=')
 'hello'
 
 
 

   s.replace(' ', '')
 'helloworld'
 import re
 re.sub('\s+', ' ', s)
 'hello world'