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PyQt-CanvasPainter is not available for PyQt5.
PyQt-CanvasPainter for PyQt6 is provided as a source distribution (sdist) and binary wheels from PyPI. The wheels will automatically install copies of the corresponding Qt libraries. To install it run:
pip install PyQt6-CanvasPainter
At the moment there are no development snapshots or pre-releases of the next version.