python核心编程正则表达式练习题1-2匹配由单个空格分隔的任意单词对，也就是性和名

 1 import re
 2 
 3 patt = ‘[A-Za-z]+ [A-Za-z]+‘  # 方法一 +加号操作符匹配它左边的正则表达式至少出现一次的情况
 4 # patt = ‘[A-Za-z]+[ A-Za-z]+‘  # 方法二
 5 # patt = ‘[A-Za-z]+\s[A-Za-z]+‘ # 方法三 

 6 name1 = ‘zhang san‘
 7 name2 = ‘li si‘
 8 name3 = ‘wang ermazi‘
 9 
10 m = re.match(patt, name1)
11 m1 = re.match(patt, name2)
12 m2 = re.match(patt, name3)
13 if m is not None:
14     print(m.group())
15 if m is not None:
16     print(m1.group())
17 if m is not None:
18     print(m2.group())