def mainx():
    print ("Hello, world11111111111111111!")

def add(a,b):  
    print ("in python function add") 
    print ("a = " + str(a))
    print ("b = " + str(b))  
    print ("ret = " + str(a+b))  
    return  
  
def foo(a):  
    print ("ret = " + str(a * a))  
    return   
  
class guestlist:  
    def __init__(self):  
        print ("aaaa")  
    def p():  
      print ("bbbbb")  
    def __getitem__(self, id):  
      return "ccccc"  
def update():  
    guest = guestlist()  
    print (guest['aa'])

mainx()




    

