In [16]:
import requests

user_repo = {"ameena12-meet": "MEET-YL2"}
for u in user_repo:
    username = u
    repo = user_repo[u]
    passwd=""
    if repo == "MEET-YL1":
        passwd = "meetyear13"
    else: 
        passwd = "meetyear2"
    r = requests.put('https://api.github.com/repos/' + username + '/' + repo + '/collaborators/mprat', auth=(username, passwd))
    print r.headers


CaseInsensitiveDict({'status': '204 No Content', 'x-ratelimit-remaining': '4999', 'x-github-media-type': 'github.beta', 'x-content-type-options': 'nosniff', 'access-control-expose-headers': 'ETag, Link, X-RateLimit-Limit, X-RateLimit-Remaining, X-RateLimit-Reset, X-OAuth-Scopes, X-Accepted-OAuth-Scopes, X-Poll-Interval', 'x-github-request-id': '50B2914C:7396:1193597:529F02C3', 'vary': 'Accept-Encoding', 'server': 'GitHub.com', 'x-ratelimit-limit': '5000', 'access-control-allow-credentials': 'true', 'date': 'Wed, 04 Dec 2013 10:24:04 GMT', 'access-control-allow-origin': '*', 'x-ratelimit-reset': '1386156244'})