python去掉空格常用方式

前言：

处理字符串时经常要定制化去掉无用的空格，python 中要么用存在的常规方法，或者用正则处理

1.去掉左边空格

string = "  * it is blank space test *  "
print (string.lstrip())

result:
* it is blank space test *  

2.去掉右边空格

string = "  * it is blank space test *  "
print (string.rstrip())

result:
  * it is blank space test *

3.去掉左右两边空格

string = "  * it is blank space test *  "
print (string.strip())

result:
* it is blank space test *

4.去掉所有空格

有两种方式
eg1：调用字符串的替换方法把空格替换成空

string = "  * it is blank space test *  "
str_new = string.replace(" ", "")
print str_new

result:
*itisblankspacetest*

eg2：正则匹配把空格替换成空

import re

string = "  * it is blank space test *  "
str_new = re.sub(r"\s+", "", string)
print str_new

result:
*itisblankspacetest*