问人名表示的不同形式的正则表达式

EN

import regex
sz = ["first_name last_name","last_name, first_name"]
for s in sz:
    print(regex.search(r'(?P<first>\w+) (?P<last>\w+)|(?P<last>\w+), (?P<first>\w+)', s).groupdict())
# => {'last': 'last_name', 'first': 'first_name'}
# => {'last': 'last_name', 'first': 'first_name'}

name, surname = re.sub(r'^(\w+),\s+(\w+)$', r'\2 \1', s).split()
# => first_name last_name
# => first_name last_name

import re
sz = ["first_name last_name","last_name, first_name"]
for s in sz:
    m = re.search(r'(\w+),\s+(\w+)|(\w+)\s+(\w+)', s)
    if m:
        surname = "{}{}".format(m.group(1) or '', m.group(4) or '')
        name = "{}{}".format(m.group(2) or '', m.group(3) or '') 
        print("{} {}".format(name, surname))
    else:
        print("No match")

   (?P<first1> \w+ )             # (1)
   [ ] 
   (?P<last1> \w+ )              # (2)
|  
   (?P<last2> \w+ )              # (3)
   , [ ] 
   (?P<first2> \w+ )             # (4)