human
Solve the following python programming problem given the following code:
def __get__(self, instance, model) : 
    if instance : 
        def timestamp_setter(ts) : 
            instance._timestamp = ts 
            return instance 
return instance 
return model.objects.timestamp 

    
    

    Fix the buggy line: return instance
assistant
#Here is Python program to fix the buggy line: return instance
.

return def timestamp_setter(