Python 如何在tkinter中连续刷新FigureCastKagg

我正在尝试使用FigureCanvasTkAgg连续自动更新tkinter中的图表，而不使用按钮

这是我到目前为止写的代码

import random
import tkinter as tk
import seaborn as sb
import matplotlib.pyplot as plt
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg

root = tk.Tk()

def cplot():
    xCord = [random.randint(0,10) for i in range(5)]
    yCord = [random.randint(0,10) for i in range(5)]

    #defining heatmap dimensions
    fig, ax = plt.subplots()

    #ploting heat map with x and y coordinates
    sb.kdeplot(xCord, yCord, shade = True, cmap = "Reds")
    ax.invert_yaxis()
    plt.axis("off")
    plt.show()

    root.after(1, cplot)
    return fig
    
fig = cplot()

canvas = FigureCanvasTkAgg(fig, master=root)
canvas.draw()
canvas.get_tk_widget().pack()
    
root.after(1, cplot)
root.mainloop()

---

要在计时器上重新生成绘图图像，请在函数内重新创建画布小部件并调用函数

请尝试以下代码：

import random
import tkinter as tk
import seaborn as sb
import matplotlib.pyplot as plt
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg

root = tk.Tk()
canvas = None

def cplot():
    global canvas
    xCord = [random.randint(0,10) for i in range(5)]
    yCord = [random.randint(0,10) for i in range(5)]

    #defining heatmap dimensions
    fig, ax = plt.subplots()

    #ploting heat map with x and y coordinates
    sb.kdeplot(xCord, yCord, shade = True, cmap = "Reds")
    ax.invert_yaxis()
    plt.axis("off")
    
    if canvas: canvas.get_tk_widget().pack_forget()  # remove previous image
    
    canvas = FigureCanvasTkAgg(fig, master=root)
    canvas.draw()
    canvas.get_tk_widget().pack()
    
    root.after(100, cplot)
        
root.after(1, cplot)
root.mainloop()

---

要在计时器上重新生成绘图图像，请在函数内重新创建画布小部件并调用函数

请尝试以下代码：

import random
import tkinter as tk
import seaborn as sb
import matplotlib.pyplot as plt
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg

root = tk.Tk()
canvas = None

def cplot():
    global canvas
    xCord = [random.randint(0,10) for i in range(5)]
    yCord = [random.randint(0,10) for i in range(5)]

    #defining heatmap dimensions
    fig, ax = plt.subplots()

    #ploting heat map with x and y coordinates
    sb.kdeplot(xCord, yCord, shade = True, cmap = "Reds")
    ax.invert_yaxis()
    plt.axis("off")
    
    if canvas: canvas.get_tk_widget().pack_forget()  # remove previous image
    
    canvas = FigureCanvasTkAgg(fig, master=root)
    canvas.draw()
    canvas.get_tk_widget().pack()
    
    root.after(100, cplot)
        
root.after(1, cplot)
root.mainloop()

---

您正在调用

return

之前

之后
这将永远不会被调用，请切换这些语句的顺序。@Mike67我交换了这两行代码的位置。图表现在会自动刷新，但是tkinter只显示第一个图表，之后不会更新。如果您在将永远不会调用的
之后调用
之前的
返回，请切换这些语句的顺序。@Mike67我交换了这两行代码的位置。图表现在会自动刷新，但是tkinter只显示第一张图表，之后不会更新。我以前不知道
pack\u forget（）
函数，谢谢您的解决方案！我以前不知道
pack\u forget（）
函数，谢谢你的解决方案！