How to obtain the name of the function caller [duplicate]

This question already has an answer here:

• Python introspection: access function name and docstring inside function definition 12 answers

I need a code that will give me the name of the function that called the one in which I am now

x = input("Do you want to once again execute this function? (1), Do you want to return back? (2)")
    x = int(x)
    if x == 1:
       #name of the function where I am now
    elif x == 2:
        #name of the function that called the one in which I am now.