how do I add a 3x1 vector in a text editor

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I need to create a musical notes editor in Python 3.10 that looks like melodos (https://www.youtube.com/watch?v=zEL1Xxog-tQ) .I would like to make a text editor in which I can add each note as a 3x1 vector like in this photo

Can anyone give me some advice on how to add an editable vector to a text editor? (There will be a font for all music notes and signs). The file must be able to be saved and re-edited. Or maybe there is a better way to make this music note editor ? Thanks

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