human
Solve the following python programming problem given the following code:
def requestAvatar(self, avatarId, mind, * interfaces) : 
    if (pb.IPerspective not in interfaces) : 
        raise NotImplementedError ('no interface') 
if (avatarId in self._cache) : 
        p = detached._cache [avatarId] 
else : 
        p = Perspective (self.service) 
p.attached (mind, avatarId) 
    def detached() : 
        p.detached (mind, avatarId) 
return (pb.IPerspective, p, detached) 

    
    

    Fix the buggy line: p = detached._cache [avatarId]
assistant
#Here is Python code to fix the buggy line: p = detached.

p = self._cache [avatarId]