我想谈谈以下内容:
假设我有以下功能:
def query(self, url, method = 'GET',payload=None):
if method == "GET":
result = requests.get(self.api_base_url+url, auth=self.__auth_token, verify=False)
print (result)
elif method == "POST":
result = requests.post(self.api_base_url+url, auth=self.__auth_token, data=payload, verify=False)
print(result)
elif method == "PUT":
result = requests.put(self.api_base_url+url, auth=self.__auth_token, data=payload, verify=False)
print(result)
我想测量休息电话所需的时间。所以我开始构建一个装饰器来测量休息时间。
def timing(f):
def wrap(*args):
time1 = time.time()
ret = f(*args)
time2 = time.time()
time_took = time2-time1
print (time_took)
return wrap
现在我要打印有效载荷。但仅适用于PUT和POST请求,而不适用于GET请求。所以我需要在装饰器中检查参数method
,但我无法在装饰器中访问此参数。特别是我想做这样的事情:
def timing(f):
def wrap(*args):
time1 = time.time()
ret = f(*args)
time2 = time.time()
time_took = time2-time1
if args[0].method == 'PUT' and args[0].method == 'POST'
print (time_took + args.[0].payload)
else:
print (time_took)
return wrap
问题:
如何在装饰器中访问函数的参数?
由于
答案 0 :(得分:0)
就像你尝试过的那样,但没有.method
。 args
是一个参数元组。
def deco(f):
def inner(*args):
print(args[0])
return f(*args)
return inner
@deco
def foo(a):
pass
foo('a')
# a
如果你不想跟踪这些论点'索引可以使用kwargs
。
def deco(f):
def inner(*args, **kwargs):
print(kwargs['a'])
print(kwargs['b'])
return f(*args, **kwargs)
return inner
@deco
def foo(a, b):
pass
foo(a=1, b=2)
# 1
# 2