Txt文件数据未显示在Matplotlib图形上

我将学习这个关于MPL中实时更新图的教程

当我运行程序时，网格显示出来，但没有从文本文件导入数据并生成任何类型的线图，并向我抛出一个“FileNotFoundError:[Errno 2]没有这样的文件或目录：'C:\Users\emira\Desktop\sample\u for_live\u graph.txt'”错误。有什么好处

import matplotlib.animation as animation

from matplotlib import style


style.use("fivethirtyeight")

figure = plt.figure()
axis1 = figure.add_subplot(1,1,1) 

def animate(interval):
    graph_data = open(r"C:\Users\emira\Desktop\sample_for_live_graph.txt").read()
    lines = graph_data.split("\n")
    xs = []
    ys = [] 
    for line in lines:
        if len(line)>1:
            x, y = line.split(",")
            xs.append(x)
            ys.append(y)
    axis1.clear()
    axis1.plot(xs, ys)


ani = animation.FuncAnimation(figure, animate, interval = 1000)
plt.show()```