Python calling function in an other function from an other function : I want to call 1 precise function in an other function from an other function

    def exemple():    
        dostuff1():  
            print:('Stuff 1')  
        dostuff2():  
            print:('Stuff 2')  
        dostuff3():  
            print:('Stuff 3')  

    def training():
        #want to call ONLY Dostuff2
