Python 3.7.0 No module named 'PyQt5.QtWebEngineWidgets'
It has been moved to a separated package.
Based on this answer and my own experience,Just execute in a terminal:
pip install PyQtWebEngineIf you still got problems with PyQt, try uninstalling all of the PyQt related libraries:
pip uninstall PyQt5pip uninstall PyQt5-sippip uninstall PyQtWebEngineThen install them again, which should fix the following errors:
ModuleNotFoundError: No module named 'PyQt5.sip'ModuleNotFoundError: No module named 'PyQt5.QtWebEngineWidgets'If you got problems uninstalling the libraries, go to your Python folder, like:
C:\Users\<USERNAME>\AppData\Local\Programs\Python\Python<PYTHON-VERSION>\Lib\site-packagesand manually delete the PyQt folders, then uninstall everything and install again.
Make sure you have the latest Python version and upgraded your pip too
For me, first uninstalling PyQtWebEngine withpip uninstall PyQtWebEngineand then reinstalling with pip install PyQtWebEnginesolved the problem of Spyder not starting.