human
Solve the following python programming problem given the following code:
@ classmethod 
@ gen.coroutine 
def _NotifyFriends(cls, client, name, user_id, invalidate) : 
    'Adds a notification to all friends of the specified user that one or more friend-visible
    attributes have been updated. Always send the notification to every friend, even if that
    "friend" has blocked the user in question. Also send a notification to the user\'s other
    devices.
    ' 
    from viewfinder.backend.db.friend import Friend 
    @ gen.coroutine 
    def _VisitFriend(friend) : 
        (yield NotificationManager.CreateForUser (client, friend.friend_id, name, invalidate = invalidate)) 
(yield gen.Task (Friend.VisitRange, client, invalidate, None, None, _VisitFriend)) 

    
    

    Fix the buggy line: (yield gen.Task (Friend.VisitRange, client, invalidate, None, None, _VisitFriend))
assistant
#Here is Python program to fix the buggy line: (yield gen.

(yield gen.Task (Friend.VisitRange, client, user_id, None, None, _VisitFriend))