Python – 文件对话框

import tkinter
import tkinter.filedialog

def btn_click():
    global p
    c = tkinter.filedialog.askopenfilename(filetypes=[("PNG",".png")])
    p = tkinter.PhotoImage(file=c)
    b2.config(image=p)

main = tkinter.Tk()
main.geometry('800x600')

b1 = tkinter.Button(main, text='Open')
b1.config(command=btn_click)
b1.pack()

b2 = tkinter.Button(main, text='...')
b2.pack()