Python factory 模块，Faker() 实例源码

def _update_discussion_user(discussion_user):
    """Helper function to create a DiscussionUser and update its username"""
    if discussion_user.username is None:
        discussion_user.username = Faker('user_name').generate({})
    discussion_user.last_sync = discussion_user.user.profile.updated_on
    discussion_user.save()