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#!/usr/bin/env python
#coding=utf8
import sys
def deco(func):
print("before %s() called on %s." % (func, sys._getframe().f_code.co_name))
func()
print("after %s() called on %s." % (func, sys._getframe().f_code.co_name))
return func
def deco_at_one(func):
print("before %s() called on %s." % (func, sys._getframe().f_code.co_name))
func()
print("after %s() called on %s." % (func, sys._getframe().f_code.co_name))
return func
def deco_at_inline_noparams(func):
def _deco_inline():
print("before %s() called on %s." % (func, sys._getframe().f_code.co_name))
res = func()
print("after %s() called on %s." % (func, sys._getframe().f_code.co_name))
return res
return _deco_inline
def deco_at_inline_params_fix(func):
def _deco_inline_params_fix(a, b):
print("before %s() called on %s." % (func, sys._getframe().f_code.co_name))
res = func(a, b)
print("after %s() called on %s." % (func, sys._getframe().f_code.co_name))
return res
return _deco_inline_params_fix
def deco_at_inline_params_unfix(func):
def _deco_at_inline_params_unfix(*args, **kwargs):
print("before %s() called on %s." % (func, sys._getframe().f_code.co_name))
res = func(*args, **kwargs)
print("after %s() called on %s." % (func, sys._getframe().f_code.co_name))
return res
return _deco_at_inline_params_unfix
def deco_at_inline_params_unfix_withparams(dcargs):
def _deco_at_inline_params_unfix_wp(func):
def __deco_at_inline_params_unfix_wp(*args, **kwargs):
print("before %s() called on %s(%s)." % (func, sys._getframe().f_code.co_name, dcargs))
res = func(*args, **kwargs)
print("after %s() called on %s(%s)." % (func, sys._getframe().f_code.co_name, dcargs))
return res
return __deco_at_inline_params_unfix_wp
return _deco_at_inline_params_unfix_wp
def deco_at_inline_params_unfix_wp_cls(dc_cls):
# dc_cls must implement static method function 'fn_sm_1' and 'fn_sm_2'
# see 'locker' module
def _deco_at_inline_params_unfix_wp_cls(func):
def __deco_at_inline_params_unfix_wp_cls(*args, **kwargs):
print("before %s() called on %s(%s)." % (func, sys._getframe().f_code.co_name, dc_cls))
dc_cls.fn_sm_1()
res = func(*args, **kwargs)
dc_cls.fn_sm_2()
print("after %s() called on %s." % (func, sys._getframe().f_code.co_name))
return res
return __deco_at_inline_params_unfix_wp_cls
return _deco_at_inline_params_unfix_wp_cls
class Class_Deco():
def __init__(self):
print("INIT deco class." )
@staticmethod
def fn_sm_1():
print(" call %s." % (sys._getframe().f_code.co_name))
@staticmethod
def fn_sm_2():
print(" call %s." % (sys._getframe().f_code.co_name))
'''
-------------------------------------------------------------------------------------------------------------------
'''
def fn():
print("%s() called." % (sys._getframe().f_code.co_name))
return 'ok'
def fn_deco():
print("%s() called." % (sys._getframe().f_code.co_name))
return 'ok'
'''
decorator function 'deco_at_one' called only one time before 'main'
decorator function 'deco_at_one' not called when per time call 'fn_at_deco_one'
'''
@deco_at_one
def fn_at_deco_one():
print("%s() called." % (sys._getframe().f_code.co_name))
return 'ok'
'''
decorator function 'deco_at_inline_noparams' called when per time call 'fn_at_deco_inline'
'''
@deco_at_inline_noparams
def fn_at_deco_inline_noparams():
print("%s() called." % (sys._getframe().f_code.co_name))
return 'ok'
'''
params samed between '_deco_inline_params_fix' and 'fn_at_deco_inline'
'''
@deco_at_inline_params_fix
def fn_at_deco_inline_params_fix(a,b):
print("%s() called." % (sys._getframe().f_code.co_name))
return a+ b
'''
'deco_at_inline_params_unfix' any params
'''
@deco_at_inline_params_unfix
def fn_at_deco_inline_params_unfix_2(a,b):
print("%s() called." % (sys._getframe().f_code.co_name))
return a+ b
'''
'deco_at_inline_params_unfix' any params
'''
@deco_at_inline_params_unfix
def fn_at_deco_inline_params_unfix_3(a,b,c):
print("%s() called." % (sys._getframe().f_code.co_name))
return a + b + c
'''
function 'deco_at_inline_params_unfix_withparams' can input params
'''
@deco_at_inline_params_unfix_withparams("wpa")
def fn_at_deco_inline_params_unfix_wp_a(a,b,c):
print("%s() called." % (sys._getframe().f_code.co_name))
return a + b + c
@deco_at_inline_params_unfix_withparams("wpb")
def fn_at_deco_inline_params_unfix_wp_b(a,b,c):
print("%s() called." % (sys._getframe().f_code.co_name))
return a + b * c
@deco_at_inline_params_unfix_wp_cls(Class_Deco)
def fn_at_deco_inline_params_unfix_wp_cls():
print("%s() called." % (sys._getframe().f_code.co_name))
return 'ok'
'''
execute order by @deco_[1,2,3]
@deco_1
@deco_2
@deco_3
def fn():
pass
'''
@deco_at_inline_noparams
@deco_at_inline_params_unfix_withparams("wpc")
@deco_at_inline_params_unfix_wp_cls(Class_Deco)
def fn_at_deco_inline_mix():
print("%s() called." % (sys._getframe().f_code.co_name))
return 'ok'
if __name__ == '__main__':
lin = " - " * 30
print lin
fna = fn()
print lin
fnb = deco(fn_deco)
print lin
fnc = fn_at_deco_one()
fnc = fn_at_deco_one()
print lin
fnd = fn_at_deco_inline_noparams()
fnd = fn_at_deco_inline_noparams()
print lin
a=2
b=3
fne = fn_at_deco_inline_params_fix(a,b)
print a,b,fne
a=12
b=32
fne = fn_at_deco_inline_params_fix(a,b)
print a,b,fne
print lin
a=2
b=3
fnf = fn_at_deco_inline_params_unfix_2(a,b)
print a,b,fnf
a=2
b=3
c=5
fnf = fn_at_deco_inline_params_unfix_3(a,b,c)
print a,b,c,fnf
print lin
fng = fn_at_deco_inline_params_unfix_wp_a(a,b,c)
print a,b,c,fng
fng = fn_at_deco_inline_params_unfix_wp_b(a,b,c)
print a,b,c,fng
print lin
fng = fn_at_deco_inline_params_unfix_wp_cls()
print lin
fnh = fn_at_deco_inline_mix()
exit(0)

参考 : http://www.cnblogs.com/rhcad/archive/2011/12/21/2295507.html

其他参考资料

1. Python装饰器学习 http://blog.csdn.net/thy38/article/details/4471421

2. Python装饰器与面向切面编程 http://www.cnblogs.com/huxi/archive/2011/03/01/1967600.html

3. Python装饰器的理解 http://apps.hi.baidu.com/share/detail/17572338

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