source: python/vendor/Python-2.7.6/Lib/idlelib/MultiStatusBar.py

from Tkinter import *

class MultiStatusBar(Frame):

    def __init__(self, master=None, **kw):
        if master is None:
            master = Tk()
        Frame.__init__(self, master, **kw)
        self.labels = {}

    def set_label(self, name, text='', side=LEFT):
        if name not in self.labels:
            label = Label(self, bd=1, relief=SUNKEN, anchor=W)
            label.pack(side=side)
            self.labels[name] = label
        else:
            label = self.labels[name]
        label.config(text=text)

def _test():
    b = Frame()
    c = Text(b)
    c.pack(side=TOP)
    a = MultiStatusBar(b)
    a.set_label("one", "hello")
    a.set_label("two", "world")
    a.pack(side=BOTTOM, fill=X)
    b.pack()
    b.mainloop()

if __name__ == '__main__':
    _test()