python中装饰器的使用以及传参

def args_is_str(function_name):
def wapper(a):
t = type(a)
if not isinstance(t(),str):
print(“参数错误”)
else:
function_name(a)

return wapper

@args_is_str
def function_demo2(args):
print(args)
function_demo2(“aa”)

================================================================================================
def many_args(function_name):
def warpper(*args):
print(*args)
function_name(*args)
return warpper
@many_args
def function_demo3(*args):
print(*args)
function_demo3(1,2,3,4,5,6)

===============================================================================================
def dict_args(function_name):
def aa(**kwargs):
print(kwargs)
return aa
@dict_args
def function_demo4(**kwargs):
print(kwargs)
function_demo4(name=“唐维浩”,age=16,add=“上海市徐家汇交通大学研究生3号楼”,job=“程序员”,sex=“男” )

==================================================================================================
def combo_args(function_name):
def w(*args, **kwargs):
print(*args, kwargs)
return w
@combo_args
def function_demo5(*args, **kwargs):
pass
function_demo5(1,2,3,name=“唐维浩”,age=25,sex=“男”)

===============================================================================================
def runtime_args(timeout):
def out_warpper(function_name):
def warpper(*args, **kwargs):
start_time = time.time()
i = function_name()
end_time = time.time()
use_time = end_time - start_time
if use_time > timeout:
print(“函数运行超时”)
#抛出异常
raise RuntimeError(“函数运行超时”)
return i #这里的i代表的是函数的返回值
return warpper
return out_warpper
#timeout函数超时
@runtime_args(timeout=3)
def function_demo6(*args, **kwargs):
time.sleep(1)
print(“demo6运行”)
#raise RuntimeError(“函数运行卡死了”)
return 1
function_demo6()

最后

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