[ Python 常見問題 ] Getting the caller function name inside another function in Python?

Source From Here 
Question 
If you have 2 functions like: 

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1. def A  
2. def B  

and A calls B, can you get who is calling B inside B, like: 

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1. def A () :  
2.     B ()  
3.   
4. def B () :  
5.     this.caller.name  

How-To 
You can use the inspect module to get the calling stack. It returns a list of frame records. The third element in each record is the caller name. What you want is this: 

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1. >>> import inspect  
2. >>> def f():  
3. ...     for frame in inspect.stack():  
4. ...             print(frame[3])  
5. ...  
6. >>> def g():  
7. ...     f()  
8. ...  
9. >>> g()  
10. f  
11. g  
12.