PyQtdoc installs Qt documentation for PyQt (.ch files, i.e. Qt assistant format) in a dedicated directory.
PyQtdoc version is indexed to Qt version.
PyQtdoc is part of the WinPython distribution project.
Since Qt5, ``QtAssistant`` cannot register documentation automatically.
You must run the ``scripts\pyqtdoc.py`` script (with option `--register`) or register them manually.