我正在嘗試保存由以下代碼生成的數字。我不斷收到錯誤。x = range(-300,1)x_2 = range(0,301)y = range(-300,1)y_2 = range(0,301)x_1 = range(-300,1)y_3 = range(0,-301,-1)x_3 = range(0,-301,-1)x_0 = [0 for i in range(301)]y_0 = [0 for i in range(301)]plt.plot(x_2,y_2, label="direction 1")plt.plot(x_2,y_3, label="direction 2")plt.plot(x_1,y, label="direction 3")plt.plot(x_3,y_2, label="direction 4")plt.plot(x_0,y_2, label="direction 5")plt.plot(x_0,y, label="direction 6")plt.plot(x_2,y_0, label="direction 7")plt.plot(x,y_0, label="direction 8")plt.legend(loc="best")plt.xlabel("x")plt.ylabel("y");我嘗試過命名其中一個代碼行并保存它，但它說列表沒有屬性保存fig。所有這些線都應該繪制在一個圖中。