python3-pyqt5.qtwebchannel-dbg 5.15.4+dfsg-3 (amd64 binary) in ubuntu impish

 Qt WebChannel enables peer-to-peer communication between the host (PyQt5
 application) and the client (HTML/JavaScript application). The transport
 mechanism is supported out of the box by the two popular web engines, Qt
 WebKit 2 and Qt WebEngine (experimental).
 .
 This package contains the extension built for the Python 3 debug interpreter.