Drawing horizontal bar charts

Thank you so much. One more thing: How can save teh

    > graph in a file and then embed it in a Tkinter canvas
    > widget,...??

you don't need to first save the graph -- though you can. You can
embed matplotlib directly. See


At this point, it would be a good idea for you to spend some time
reading the documentation on the website, as many of these ideas are
covered there.