python 閉包與裝飾器

def

my_func()
:print
('this is my func ...'
)

def

func_outer
(func)
:print
('this is outer func ...'
)def
func_inner
(*arg,
**kwargs)
:# 可以在內函式中新增新的功能
print
('this is inner func'
)return func(
)return func_inner
f = func_outer(my_func)
f()

this is outer func ...

this is inner func
this is my func .
..

def

func_outer
(func)
:print
('this is outer func ...'
)def
func_inner
(*arg,
**kwargs)
:print
('this is inner func'
)return func(
)return func_inner
@func_outer
defmy_func()
:print
('this is my func ...'
)# my_func()

d:\user\80005354\桌面\stupy>d:/python/python.exe d:/user/80005354/桌面/stupy/1-裝飾器.py

this is outer func .
..

def

func_oouter
(name)
:def
func_outer
(func)
:print
('this is outer func ...'
)def
func_inner
(*arg,
**kwargs)
:print
('my name is '
, name)
print
('this is inner func'
)return func(
)return func_inner
return func_outer
@func_oouter(name=
'bruin'
)def
my_func()
:print
('this is my func ...'
)my_func(
)

d:\user\80005354\桌面\stupy>d:/python/python.exe d:/user/80005354/桌面/stupy/1-裝飾器.py

this is outer func ...
my name is  bruin
this is inner func
this is my func ...

class

speak
(object):
def__init__
(self, func)
:        self.func = func
def__call__
(self,
*arg,
**kwargs)
:        self.speak(
)return self.func(
*arg,
**kwargs)
defspeak
(self)
:print
('i can speak now!'
)def
people
(*arg,
**kwargs)
:print
(kwargs[
'name'],
'is dance ~ ~'
)speak = speak(people)
speak(name=
'jack'
)type
(people)
,isinstance
(people, speak)
# 結果如下：
i can speak now!
jack is dance ~
~(function,
false
)

@speak

defpeople
(*arg,
**kwargs)
:print
(kwargs[
'name'],
'is dance ~ ~'
)p = people(name=
'jack'
)type
(people)
,isinstance
(people, speak)
# 結果如下：
i can speak now!
jack is dance ~
~(__main__.speak,
true
)

import functools

class
speak
(object):
def__init__
(self,
*args,
**kwargs)
:print
(args)
def__call__
(self, func)
:       
@functools.wraps(func)
definner_wraps
(*arg,
**kwargs)
:            self.speak(
)return func(
*arg,
**kwargs)
return inner_wraps
defspeak
(self)
:print
('i can speak now!'
)@speak(1,
2)defpeople
(*arg,
**kwargs)
:print
(kwargs[
'name'],
'is dance ~ ~'
)people(name=
'jack'
)type
(people)
,isinstance
(people, speak)
# 結果如下(1
,2)i can speak now!
jack is dance ~
~(function,
false
)

python閉包與裝飾器

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