407 response from proxy using python requests

Question

Below is the code that i used. I am using latest python requests. I am getting 407 response from the below request using python 2.7. And strange thing is i am getting 503 response while using https instead of http in the requests.

response = requests.get(query, proxies={'https': "https://username:[email protected]:80"}, headers=headers, timeout=30, allow_redirects=True)
print response

Output: Response [503]

response = requests.get(query, proxies={'http': "http://username:[email protected]:80"}, headers=headers, timeout=30, allow_redirects=True)
print response

Output: Response [407]

But the same code is working on my amazon ec2 instance. Though i am trying to run in local machine.

import urllib2
import urllib
import portalocker
import cookielib
import requests

query = 'http://google.com/search?q=wtf&num=100&tbs=cdr:1,cd_min:2000,cd_max:2015&start=0&filter=0'
headers = {'user-agent': 'Mozilla/5.0 (X11; Linux; rv:2.0.1) Gecko/20100101 Firefox/4.0.1 Midori/0.4'}
response = requests.get(query, proxies={'http': "http://username:[email protected]:80"}, headers=headers, timeout=30, allow_redirects=True)
print response

Answer 1

from requests.auth import HTTPProxyAuth

proxyDict = { 
          'http'  : '77.75.105.165', 
          'https' : '77.75.105.165'
        }
auth = HTTPProxyAuth('username', 'mypassword')

r = requests.get("http://www.google.com", proxies=proxyDict, auth=auth)