import tkinter as tk

import time


#=================================================

# definition of class

#=================================================

class StatusBar(tk.Frame):


    def __init__(self, master):

        tk.Frame.__init__(self, master)

        self.main = tk.Label(self, bd=1, relief="sunken", anchor="n",\

                                 height=10, width=20, text="status bar test")

        self.main.pack(fill="both")

        self.label = tk.Label(self, bd=1, relief="sunken", anchor="w")

        self.label.pack(fill="x")


    def set(self, format, *args):

        self.label.config(text=format % args)

        self.label.update_idletasks()


    def clear(self):

        self.label.config(text="")

        self.label.update_idletasks()


#=================================================

# main function

#=================================================

if __name__  == '__main__':

    root = tk.Tk()

    status = StatusBar(root)

    status.pack(side="bottom", fill="x")

    for var in range(0, 101):

        status.set("status\t%d percent",var)

        time.sleep(1)

    root.mainloop()