https://groups.google.com/forum/#!forum/leo-editor
https://github.com/flexxui/pscript
https://github.com/flexxui/flexx
https://github.com/kmolab/pymcadp
https://github.com/goldsborough/Writer-Tutorial (https://www.binpress.com/building-text-editor-pyqt-1/)
https://github.com/mfitzp/15-minute-apps
https://github.com/Ultimaker/Cura
https://github.com/maicss/PyQt5-Chinese-tutoral
https://github.com/skinex/CRUD-SQLite-
https://github.com/LewisTian/PyQt5-Apps