G'day amboxer21,

"is it possible to run a command every x seconds? Lets say i wanted to watch for new lines in a file and if there is a new line, parse the line for a specific word and add that word to a button on a tk UI? Continue to do so as long as new lines are added tot hat file?"

Yes. Take a look at these (and related information they link to):

• Tk::after - Execute a command after a time delay
• Tk::fileevent - Execute a callback when a filehandle becomes readable or writable

There's plenty of examples of using both of those on this site (use Super Search).

Important: Using sleep in a Tk application (as suggested in other responses) is a very bad idea because it interferes with the event loop (started by MainLoop).

You'll also need the -textvariable option (described in Tk::options) to change the text of your Tk::Button.

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