Python script to unwatch all repositories of an organization.

unsubcribe_from_repos.py

from github import Github
# pip install PyGithub
ORG_NAME = 'YOUR_ORG'
ACCESS_TOKEN = 'YOUR_ACCESS_TOKEN'

g = Github(ACCESS_TOKEN)

me = g.get_user()
watching_repos = list(me.get_watched())
watching_orgs_repos = [r for r in watching_repos if r.owner.login == ORG_NAME]


print(f'Total repos watched by {me.login}: {len(watching_repos)}')
print(f'Total {ORG_NAME}\'s repos watched by {me.login}: {len(watching_orgs_repos)}\n')

for repo in watching_orgs_repos:
    print(f'Unsubscriping from {repo.full_name}')
    me.remove_from_watched(repo)