class Node:

    def __init__(self, state, action):
        self.state = state
        self.action = action
        self.parent = None


    def getAction(self):
        return self.action

    def __hash__(self):
        """Overrides the default implementation"""
        return hash(self.state)

    def __eq__(self, other):
        if isinstance(other, self.__class__):
            return self.state == other.state
        else:
            return False

    def __ne__(self, other):
        return not self.__eq__(other)