#def a(): # : code block # print("hi") #def b(): # print("HELLO") #a() #b() #def a(x,y): # a = x + y # print(a) #a(3,4) #def a(x): # x() #def b(): # print("function b") #a(b) #def a(): # global x # x() #def x(): # print("function b") #a() #def a(): # print("function a") #def b(): # print("function b") #print(a,b) #print(a(),b()) #print(None, b()) print(None,None)