字符串，利用全大写的单词和独自离开，其余

Question

例如，通过此程序已经走了的字符串：

Hello, WORLD, McGisty, you are my HERO THAT I am. 

应该返回/是：

Hello, World, McGisty, you are my Hero That I am. 

Answer 1

>>> x = 'Hello, WORLD, McGisty, you are my HERO THAT I am.' 
>>> m = ' '.join(e.capitalize() if e.isupper() else e for e in x.split()) 
>>> m 
'Hello, World, McGisty, you are my Hero That I am.' 

Answer 2

使用re模块：

>>> import re 
>>> x = 'Hello, WORLD, McGisty, you are my HERO THAT I am.' 
>>> re.sub(r'[A-Z]+', lambda s: s.group().capitalize(), x) 
'Hello, World, McGisty, you are my Hero That I am.'