tkinter example

#Open an Image File and display some simple metadata.

import os							# os.stat
from tkinter import *
import time                         # for getting time
from tkinter import filedialog
from tkinter import messagebox
from tkinter import ttk


class Gui:

    def __init__(self, parent):

        self.parent = parent
        self.parent.title("Display the file metadata.")

        # Make protocol handler manage interaction between the program and the window
        parent.protocol("WM_DELETE_WINDOW", self.catch_destroy)

        frame = Frame(self.parent, padx="5m", pady="5m")
        frame.grid(row=0, column=0)

        self.menu = Menu(frame)
        self.file_menu = Menu(self.menu)
        self.file_menu.add_command(label="Open", command=self.open_file)
        self.file_menu.add_separator()
        self.file_menu.add_command(label="Exit", command=self.catch_destroy)

        self.menu.add_cascade(label="File", menu=self.file_menu)
        self.parent.config(menu=self.menu)

        self.filename = StringVar()
        self.filename.set("FILENAME")
        self.filesize = StringVar()
        self.filesize.set("FILESIZE")
        self.createdate = StringVar()
        self.createdate.set("CREATE DATE")

        label = Label(frame, textvariable=self.filename)
        label.grid(row=0, column=0)
        label = Label(frame, textvariable=self.filesize)
        label.grid(row=1, column=0)
        label = Label(frame, textvariable=self.createdate)
        label.grid(row=2, column=0)

    def catch_destroy(self):
        if messagebox.askokcancel("Quit", "Are you sure?"):
            self.parent.destroy()

    def open_file(self):
        my_file = filedialog.askopenfilename(filetypes=(("JPEG", "*.jpg; *.jpeg"), ("PNG", "*.png"),
                                                        ("TIFF", "*.tif; *.tiff"), ("SVG", ".svg"),
                                                        ("All Files", "*.*")))
        if my_file:
            self.filename.set("FILE: {}".format(my_file))
            self.filesize.set("SIZE: {0:.3f} KB".format(os.stat(my_file).st_size/1024))

            my_time = time.asctime(time.localtime(os.stat(my_file).st_ctime))
            self.createdate.set("CREATED: {}".format(my_time))


def main():

    root = Tk()
    Gui(root)
    root.mainloop()

if __name__ == "__main__":
    main()