# Request 100 repositories per page (and only their slugs), and the next page URL
next_page_url = 'https://api.bitbucket.org/2.0/repositories/%s?pagelen=100&fields=next,values.slug' %team

# Keep fetching pages while there's a page to fetch
full_repo_list = []

while next_page_url is not None:
    response = requests.get(next_page_url, auth=(username, password))
    print ("response> %s" %response)
    page_json = response.json()
    print ("page_json> %s" %page_json)

    # Parse repositories from the JSON
    for repo in page_json['values']:
        full_repo_list.append(repo['slug'])

    # Get the next page URL, if present
    # It will include same query parameters, so no need to append them again
next_page_url = page_json.get('next', None)

# Result length will be equal to `size` returned on any page
print ("Result: \n", len(full_repo_list))