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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def connect(self, receiver, sender=None, weak=True, dispatch_uid=None):
 """ Connect receiver to sender for signal. Arguments: receiver A function or an instance method which is to receive signals. Receivers must be hashable objects. If weak is True, then receiver must be weak referenceable. Receivers must be able to accept keyword arguments. If a receiver is connected with a dispatch_uid argument, it will not be added if another receiver was already connected with that dispatch_uid. sender The sender to which the receiver should respond. Must either be of type Signal, or None to receive events from any sender. weak Whether to use weak references to the receiver. By default, the module will attempt to use weak references to the receiver objects. If this parameter is false, then strong references will be used. dispatch_uid An identifier used to uniquely identify a particular instance of a receiver. This will usually be a string, though it may be anything hashable. """

        if dispatch_uid:
            lookup_key = (dispatch_uid, _make_id(sender))
        else:
            lookup_key = (_make_id(receiver), _make_id(sender))

        if weak:
            ref = weakref.ref
            receiver_object = receiver
            # Check for bound methods
            if hasattr(receiver, '__self__') and hasattr(receiver, '__func__'):
                ref = WeakMethod
                receiver_object = receiver.__self__
            if six.PY3:
                receiver = ref(receiver)
                weakref.finalize(receiver_object, self._remove_receiver)
            else:
                receiver = ref(receiver, self._remove_receiver)

        with self.lock:
            self._clear_dead_receivers()
            for r_key, _ in self.receivers:
                if r_key == lookup_key:
                    break
            else:
                self.receivers.append((lookup_key, receiver))
            self.sender_receivers_cache.clear()