1 def outer(func): 2     def inner(*arg, **kwargs): 3         print('123') 4         ret = func(*arg, **kwargs) 5         print('112233') 6         return ret 7     return inner 8  9 10 def home(s1, s2):11     return 'home'12 13 14 def show(s1, ss):15     return 'show'16 17 @outer18 def f1(arg):19     print('F1')20 21 22 23 def f2(a1, a2, a3):24     print('F2')25     return26 f1([1])27 f2(1,2,3)