Pyqt6 Ui Development Rules

Solid ruleset if you're building PyQt6 desktop apps and want to avoid the usual mistakes that make UIs freeze or become unmaintainable. It enforces the big ones: signal/slot architecture instead of direct method calls, QThread for anything that might block, QSS stylesheets at the application level, and layout managers over pixel coordinates. The MVC separation examples are clean and the anti-pattern table actually calls out real problems like testing impossibility and cross-platform rendering breakage. If you've ever dealt with a PyQt app that locks up during file I/O or looks broken on high-DPI displays, this is the discipline you needed from day one.