Stringing me along

zltzlt

Implement a function that receives a string, and lets you extend it with repeated calls. When no argument is passed you should return a string consisting of space-separated words you've received earlier.
Note: there will always be at least 1 string; all inputs will be non-empty.

For example:

1. create_message("Hello")("World!")("how")("are")("you?")() == "Hello World! how are you?"

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我的解答：

1. def create_message(s):
   
2.     strings = []
   
3. 
   
4.     def _msg(string=None):
   
5.         if string is None:
   
6.             return " ".join(strings)
   
7.         strings.append(string)
   
8.         return _msg
   
9.    
   
10.     return _msg(s)

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henry2018

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