简单装饰器示例：
代码语言：javascript复制def servlet(func):
print("into servlet")#1
print(servlet)#2
def foo():
print("into foo")#7
print(func)#8，真正的bar函数
func()#9
print("out foo")#13
print(foo)#3
print("out servlet")#4
return foo
@servlet
def bar():
print("in old bar")/#0
print(bar)#11
print("out old bar")#12
print(bar)#5，已经被装饰器装饰了
bar()#6执行顺序如上，执行结果如下
代码语言：javascript复制into servlet
<function servlet at 0x00000186A1341E18>
<function servlet.<locals>.foo at 0x00000186A1801E18>
out servlet
<function servlet.<locals>.foo at 0x00000186A1801E18>
into foo
<function bar at 0x00000186A1801AE8>
in old bar
<function servlet.<locals>.foo at 0x00000186A1801E18>
out old bar
out foo
Process finished with exit code 0可变参数装饰器示例：
代码语言：javascript复制def desc(func):
print("in desc")
print(desc)
def foo(*arg1,**arg2):
print("in foo")
print(func)
x = func(*arg1,**arg2)
print("out foo")
return x
print(foo)
print("out desc")
return foo
@desc
def setArg1(x,y):
print("in setArg1")
print(setArg1)
print("out setArg1")
return x y
@desc
def setArg2(x,y,z):
print("in setArg2")
print(setArg2)
print("out setArg2")
return x y z
print(setArg1)
print(setArg2)
x = setArg1(100,200)
y = setArg2(100,200,300)
print(x)
print(y)代码如上，执行结果如下
代码语言：javascript复制in desc
<function desc at 0x0000024DF2611E18>
<function desc.<locals>.foo at 0x0000024DF2AD1E18>
out desc
in desc
<function desc at 0x0000024DF2611E18>
<function desc.<locals>.foo at 0x0000024DF2AD1EA0>
out desc
<function desc.<locals>.foo at 0x0000024DF2AD1E18>
<function desc.<locals>.foo at 0x0000024DF2AD1EA0>
in foo
<function setArg1 at 0x0000024DF2AD1AE8>
in setArg1
<function desc.<locals>.foo at 0x0000024DF2AD1E18>
out setArg1
out foo
in foo
<function setArg2 at 0x0000024DF2AD1A60>
in setArg2
<function desc.<locals>.foo at 0x0000024DF2AD1EA0>
out setArg2
out foo
300
600
Process finished with exit code 0
