我在 tkinter 中收到“canvas object has no attribute get_tk_widget”错误

问：

当我在thinkter库中运行以下代码时，我从get_tk_widget（）中得到一个属性错误。我收到“canvas object has no attribute get_tk_widget”错误。我可以写什么来代替这段代码？

try:
        if canvas:
            canvas.get_tk_widget().grid_forget()

        canvas = FigureCanvasTkAgg(fig, master=root)
        canvas_widget = canvas.get_tk_widget()
        canvas_widget.grid(row=8, columnspan=4, sticky="nsew")

        scrollbar = tk.Scrollbar(root, orient="horizontal", command=canvas_widget.get_tk_widget().xview)
        scrollbar.grid(row=9, columnspan=4, sticky="ew")
        canvas_widget.get_tk_widget().configure(xscrollcommand=scrollbar.set)

canvas_widget.get_tk_widget().bind('<Configure>', on_canvas_configure)

Gui 屏幕打开，但此处的get_tk_widget给出了 attirbute 错误。