裝飾器：

 1 >>> def a(func):
 2 ...     def b(*argv):
 3 ...         print("in b")
 4 ...         return func(*argv)
 5 ...     return b
 6 ... 
 7 >>> def c(a,b):
 8 ...     print(a**2,b**2)
 9 ... 
10 >>> c = a(c)
11 >>> c(2,3)
12 in b
13 4 9
14 >>> c.__name__
 

15 ‘b‘
16 >>> @a         #裝飾器語法糖 =  c = a(c)
17 ... def cc(a,b):
18 ...     print(a**2,b**2)
19 ... 
20 >>> cc(2,3)
21 in b
22 4 9
23 >>> cc.__name__
24 ‘b‘

python裝飾器&語法糖