如何反复在Tkinter画布上删除和重绘matplotlib图形？

问题描述

我写了一个Python程序，我想在画布上多次绘制和擦除图形。我的Python代码如下所示。

问题是我只能一次绘制图形！单击绘图按钮后，单击清除按钮。然后，单击“绘图”按钮。但是，没有数字不再！

是什么原因？有什么主意吗？


from tkinter import * 
from matplotlib.figure import figure 
from matplotlib.backends.backend_tkagg import (figureCanvasTkAgg,NavigationToolbar2Tk) 
  


def clearPlot():
    
    canvas.get_tk_widget().delete("all")
    #canvas.delete("all")
    return None

def plot(frame): 
  
    # the figure that will contain the plot 
    fig = figure(figsize = (5,5),dpi = 100) 
  
    print("inside the plot")
    # list of squares 
    y = [i**2 for i in range(101)] 
  
    # adding the subplot 
    
    ax= fig.add_subplot(111) 
  
    # plotting the graph 
    ax.plot(y) 
  
    # creating the Tkinter canvas 
    # containing the Matplotlib figure 
    global canvas
    canvas = figureCanvasTkAgg(fig,master = frame)   
    canvas.draw() 
  
    # placing the canvas on the Tkinter window 
    canvas.get_tk_widget().pack()
    
  
    # creating the Matplotlib toolbar 
    toolbar = NavigationToolbar2Tk(canvas,frame) 
    toolbar.update() 
  
    # placing the toolbar on the Tkinter window 
    canvas.get_tk_widget().pack() 
    print("Exiting Plot")
    return None
  
# the main Tkinter window 
window = Tk() 
  
# setting the title  
window.title('Plotting in Tkinter') 
  
# dimensions of the main window 
window.geometry("800x700") 

# Frame for TreeView
frame1 = LabelFrame(window,text="Data_Visualization")
frame1.place(height = 400,width = 500,rely = 0.3,relx = 0.2)

# Frame for Open File Dialog
frame2 = LabelFrame(window,text="Command Functions")
frame2.place(height = 150,rely = 0.0,relx = 0.2)

  
# button that displays the plot 
plot_button = Button(master = frame2,command = lambda:plot(frame1),height = 2,width = 10,text = "Plot") 
  
# place the button  
# in main window 
#plot_button.pack() 
plot_button.place(rely = 0.0,relx = 0.2)
clear_button = Button(master = frame2,command = lambda:clearPlot(),text = "Clear") 
  
# place the button  
# in main window 
#lear_button.pack() 
clear_button.place(rely = 0.0,relx = 0.6)
  
# run the gui 
window.mainloop()

解决方法

暂无找到可以解决该程序问题的有效方法，小编努力寻找整理中！

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matplotlib tkinter-canvas