pyqt5 textedit delete lines as they move past specified line

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I'd like to setup the PYQT Qtextedit widget and use it to monitor another applications activity log(like tail -f on Linux). Long term I worry about it running for too long and using a lot of ram with the text that builds up. Is it possible to set a limit so that text moving past line x gets deleted? From what I've found it seems to require custom work and I'd like to find a limiter setting if one exists.

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