将具有不同数量变量的参数传递给功能

Question

I am trying to create function that would take a random amount of parameters some defined, others not. So I have this search function that would sometimes take all of the arguments, but sometimes just url, query and authHeader.

I did study about *arg, **kwards, but AFAIK they did not suit in this case. Or do I always have to give them some value in my case, for example "null"? But that means I need to assign a value to variable and could not just pass it that time?

def search(url, query, resultLimit, resultInfoSize, authHeader):
searchRequest = session.post(url + '/services/search?q=' + query + '&num=' + resultLimit + '&datalinesToReturn='+ resultInfoSize, headers=authHeader)
searchData = searchRequest.json()
return searchData

Any opinion much appreciated.

Update

as @Jerrybibo kindly stated I got my aswer:

So adding if condition in the function was what I was looking for. Changing the default values inside the function if on call none are provided.

def search(url, query, resultLimit, authHeader, resultLimit=None, resultInfoSize=None):
if resultLimit == None: resultLimit='50'
if resultInfoSize == None: resultInfoSize=''
searchRequest = session.post(url + '/services/search?q=' + query + '&num=' + resultLimit + '&datalinesToReturn='+ resultInfoSize, headers=authHeader)
searchData = searchRequest.json()
return searchData

Answer 1

Looking at your question, I believe one way of working around this is to have several of your function parameters set to default sentinel values (usually None ; use whichever default value makes sense in your scenario) so that you do not have to pass the values on function call; and if you do pass them, they get processed just like normal parameters. Your function definition would look like this:

def search(url, query, authHeader, resultLimit=None, resultInfoSize=None):

Additionally, you may have to change your searchRequest definition in the function in the event that resultLimit or resultInfoSize is None .