如何修复python中的属性错误，以便在GUI中实时绘图？

import tkinter as tk

class RealTimePlot:
    def __init__(self, root):
        self.root = root
        self.canvas = tk.Canvas(root, width=600, height=400)
        self.canvas.pack()
        self.data = []
        self.update_plot()

    def update_plot(self):
        try:
            # 假设这里有一个方法来更新数据
            self.data.append(len(self.data))  # 示例数据更新
            self.draw_plot()
        except AttributeError as e:
            print(f"属性错误: {e}")
            # 这里可以添加更具体的错误处理逻辑
        finally:
            self.root.after(100, self.update_plot)  # 每100毫秒更新一次

    def draw_plot(self):
        self.canvas.delete("all")  # 清除之前的绘图
        for i, value in enumerate(self.data):
            x1, y1 = i * 5, 400 - value * 5
            x2, y2 = x1 + 5, 400
            self.canvas.create_line(x1, y1, x2, y2, fill="blue")

# 创建主窗口
root = tk.Tk()
app = RealTimePlot(root)
root.mainloop()