相关疑难解决方法(0)

我的代码生成以下错误: TypeError: object() takes no parameters

class Graph(object):
    def vertices(self):
        return list(self.__graph_dict.keys())

if __name__ == "__main__":

    g = { "a" : ["d"],
          "b" : ["c"],
          "c" : ["b", "c", "d", "e"],
          "d" : ["a", "c"],
          "e" : ["c"],
          "f" : []
        }

    graph = Graph(g)

    print("Vertices of graph:")
    print(graph.vertices())

有没有办法解决这个问题？