python tkinter实时显示曲线

from tkinter import *from tkinter import ttkimport time#画窗口root = Tk()root.geometry('1000x500')root.resizable(False, False)graph = Canvas(root, width=1000, height=550, background='black')#后面查点和删点的时候须要画布类graph.grid()#初始化点tracePlot=[20,20,30,30,40,50,56,78]#实现动态显示while True:    t = time.time()    time.sleep(1)    tracePlot[3]=int(t % 100) #动态变化的数据    traceID = graph.create_line(tracePlot, fill='Red', width=2)    root.update_idletasks()    root.update()#更新显示    graphItems = graph.find_all()    for n in graphItems:        graph.delete(n) #若是没有删除操做，旧点不消除，新点也会画在上面