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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 notify_observers(self, signal, **kwargs):
 """ Notify observers of a given signal. Parameters signal : str a valid signal. kwargs : dict the parameters that will be sent to the observers. Returns ------- out: bool False if a notification is in progress, otherwise True. """


        # Check if a notification if in progress
        if self._locked:
            return False
        # Set the lock
        self._locked = True

        # Create a signal object
        signal_to_be_notified = SignalObject()
        setattr(signal_to_be_notified, "object", self)
        setattr(signal_to_be_notified, "signal", signal)
        for name, value in kwargs.items():
            setattr(signal_to_be_notified, name, value)
        # Notify all the observers
        for observer in self._observers[signal]:
            observer(signal_to_be_notified)
        # Unlock the notification process
        self._locked = False