QtWebKit
got deprecated upstream in Qt 5.5 and removed in 5.6.
You may want to switch to PyQt5.QtWebEngineWidgets.QWebEngineView.
For basic use of PyQt5.QtWebKitWidgets.QWebView
, it can simply be updated to use PyQt5.QtWebEngineWidgets.QWebEngineView
in the source code, but there may be some differences in the new component which require further adjustments.