A script based on this blog post: <http://hvelarde.blogspot.tw/2014/01/how-to-get-statistics-about-your.html>

github_commits_in_a_organization.py

#!/usr/bin/env python3

from pprint import pprint

# Make sure you've installed github3.py via `pip install --pre github3.py`
from github3 import login


MY_GITHUB_USERNAME = ""
# Visit https://github.com/settings/tokens to create a token if you don't have.
# Check "repo" permission
MY_GITHUB_TOKEN = ""
TARGET_ORGNIZATION_NAME = ""

user = login(token=MY_GITHUB_TOKEN)
org = user.organization(TARGET_ORGNIZATION_NAME)
my_stats = []

for repo in org.repositories():
    for contribution in repo.contributor_statistics():
        if MY_GITHUB_USERNAME in repr(contribution.author):
            print(repo.name, contribution.total)
            my_stats.append((repo.name, contribution.total))

print("")
print('=' * 80)
print("")
print("GitHub username: {}".format(MY_GITHUB_USERNAME))
print("Target GitHub organization: {}".format(TARGET_ORGNIZATION_NAME))
print("Total contributed repos: {}".format(len(my_stats)))
print("Total commits: {}".format(sum(commits for repo, commits in my_stats)))

my_stats_desc_sorted = sorted(my_stats, key=lambda x: x[1], reverse=True)
print("Repo and commits:")
pprint(my_stats_desc_sorted)