How I could do that in the best way?

[Kalet]

Hi, I would like to know if there is a way to validate the '{}' when I receive them in a function. For example, I receive a URL and I have two parameters and I can perfectly do the .format. However, what if I have several URLs and some of them have the following model:

import re
def test(param):
        # I need here know how many {} I will receive
        print(param.format("google.com", "webpath")) 

test("http://{}/something/{}")
# What's happen if I will do the next?
#test("http://{}/something/{}/{}/{}/{}")

It is for this reason, that maybe it could be done with re.replace, but it seems to me a rudimentary way and even so, I think it would not solve the problem:

import re
def test(param):

        print(param.format(param.replace('[host]', 'a'), param.replace('[path]',"b")))

test("http://[host]/something/[path]")

Any ideas?

Thank you!