Has key check for a Class

Question

I have a an if check that uses has.key:

    if self.has_key(observer.key):

and i am trying to replace it to use the in keyword.

I have tried doing:

    if observer.key in self:
    # 
    if observer.key in self.__dict__:

But neither of them work returning:

    E       TypeError: argument of type 'Observers' is not iterable

Answer 1

The class had a has_key method deep inside, which did this functionality but i assume pycharm though it was the builtin method:

def has_key(self, key):
    return key in self.keys