How can we raise a HTTPError exception?

I want to raise an exception whenever i get data value as None. How can we achieve it without using custom exception?

Ex:

def foo():
      <some code>
      return data

@store.route("/store", methods=["GET"])
def fun():
    try:
       data = foo()
       if not data:
           raise HTTPError()
    except HTTPError as he:
       return "Internal server error", 500

I tried above one, but its not working, appreciate your help

>Solution :

I think sou can rais a http error as following:

from urllib2 import urlopen, HTTPError # or from urllib.error import HTTPError

def fooo():
   raise HTTPError()

fooo()

reference