status_notifications.py 文件源码

def get_message_change_ratio(status_update):
    """Expects a status update instance, returns a number representing
    how much a message has been edited (1.0 completely changed, 0.0 unchanged)
    based on Levenshtein ratio.
    If a status update has no associated notification, returns None
    https://github.com/ztane/python-Levenshtein
    """
    if hasattr(status_update, 'notification'):
        author_profile = status_update.author.profile
        intro_text = get_notification_intro(author_profile) + '\n\n'
        return 1.0 - Levenshtein.ratio(
            *[message.replace(intro_text, '')
              for message in (
                status_update.notification.base_message,
                status_update.notification.sent_message)])
    else:
        return None