from tkinter import *
from tkinter import filedialog
from PIL import Image, ImageTk
import cv2
def main():
root = Tk()
root.title("face")
w=root.winfo_screenwidth()
h=root.winfo_screenheight()
root.geometry("%dx%d" % (w, h))
def openimage(): #in this part I just want to keep just one picture in Frame
fname = filedialog.askopenfilename()
image = Image.open(fname)
(width, height)=image.size
if width>=height:
new_width=t1.winfo_width()
new_height=int(height*t1.winfo_width()/width)
image = image.resize((new_width, new_height), Image.ANTIALIAS)
else:
new_height=t1.winfo_height()
new_width=int(width*t1.winfo_height()/height)
image = image.resize((new_width, new_height), Image.ANTIALIAS)
render = ImageTk.PhotoImage(image)
img = Label(t1, image=render)
img.image = render
img.place(x=0, y=0)
def finish():
exit()
menubar = Menu(root)
root.config(menu=menubar)
menu1 = Menu(root)
menu1.add_command(label='openphoto', command=openimage)
menu1.add_command(label='get')
menu1.add_command(label='save')
menu2 = Menu(root)
menu2.add_command(label='read')
menu2.add_command(label='training')
menu3 = Menu(root)
menu3.add_command(label='openphotos')
menu3.add_command(label='dis')
menu4 = Menu(root)
menu4.add_command(label='quit', command=finish)
menubar.add_cascade(label="catch", menu=menu1)
menubar.add_cascade(label="train", menu=menu2)
menubar.add_cascade(label="distinguish", menu=menu3)
menubar.add_cascade(label="exit", menu=menu4)
t1=Frame(width=500,height=500, bg='gray')
t1.grid(padx=100, pady=100)
root.mainloop()
if __name__ =='__main__':
main()
我希望能够清空框架中的内容，或者在选择另一张图片时不显示之前的图片。每次选择一张图片时，它与上次选择使用的参数无关。因此，我想每次选择一张图片时都清空框架。我已经尝试了很多方法，但不知道该如何清空。