from github import Github
from collections import Counter
import sys

USER = None
PASSWORD = None

def get_repo(repo_name):
    contribs = list(g.get_repo(repo_name).get_contributors())

    return {'contribs': [c.login for c in contribs]}

g = Github(USER, PASSWORD)

repos = [get_repo(r) for r in sys.argv[1:]]

print("Contributors in all of:", ", ".join(sys.argv[1:]))

contribs = set(repos[0]["contribs"])
for repo in repos[1:]:
    contribs &= set(repo["contribs"])

for contrib in contribs:
    print("-", contrib)

print("")
print("Furthermore, the most nomadic contributors:")
print("")

nomadic = Counter()

for repo in repos:
    for contrib in repo["contribs"]:
        nomadic[contrib] += 1

for (user, n) in nomadic.most_common():
    print("- %s (%d repositories)" % (user, n))