After doing sudo apt update, I start typing sudo apt install pyqt and then press the tab key twice to see what packages are available:
pyqi pyqt5chart-dev pyqt5.qsci-dev pyqwt3d
pyqso pyqt5-dev pyqt5webengine
pyqt5 pyqt5-dev-tools pyqt-qwt
pyqt5chart pyqt5-examples pyquery
And then, when I try installing with sudo apt install pyqt5, it says E: Unable to locate package pyqt5. Why list it then when I hit the tab key twice?