r = requests.get(url, headers) code example

Example 1: python send get request with headers

r=requests.get("http://www.example.com/", headers={"content-type":"text"})

Example 2: raise_for_status() requests

Raise an exception if a request is unsuccessful

import requests
url = "http://mock.kite.com/status/404"
r = requests.get(url)
try: 
    r.raise_for_status()
except requests.exceptions.HTTPError as e: 
    print e
OUTPUT
404 Client Error: NOT FOUND