What did you try? I ran your code and got exactly the error OP reported - when I pressed the return key in the text edit field.

After altering the code as suggested in my reply (posted over an hour before your reply) the code works as the OP requires. You could try it (the modified code) yourself as a check. You need to type something into the text edit control then press return and observe that whatever you typed is printed to the console.

True laziness is hard work

In reply to Re^2: Tk Error by GrandFather
in thread Tk Error by k0rn

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