GUI Programming in Python For Beginners: Create a Timer in 30 Minutes

"TkInter isn't necessarily the most powerful of the Python windowing packages, but it's well supported on all operating systems. You can give your application to your Windows- and Mac-using friends and they'll be able to run it, as long as they have Python installed. On Linux, though, you may have to install it: on Ubuntu or Debian the package is named python-tk, while in Fedora it's tkinter.

"For a project, start with a simple one. How about an "eggtimer"? I'm always forgetting that I have cornbread baking in the oven, or that I turned on the sprinklers in the garden. I need something to remind me.

"Let's start with a very simple Tkinter program. Paste the following into your editor of choice (vim, emacs, kate, leafpad or whatever) and write it to a file named, say, eggtimer:"

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