I\'m following Mark Summerfield\'s Rapid GUI Programming with Python and Qt which is using PyQt4. I\'d prefer to be working with PyQt5, but I have both on my ma
Rapid GUI Programming with Python and Qt
You are using old-style signals and slots which have not been implemented in PyQt5. Try using new-style signals and slots.
self.lineedit.returnPressed.connect(self.updateUi)