QPushButton clicked signal not received by main window

Features · A signal fired anywhere in any class of your code can be received by slots in any class of your code · You can connect as many

Each signal function can have an arbitrary number of parameters The signals are connected to slots, which can be either free functions, member functions or

signal and slot arguments are not compatible At the core of the signal-slot mechanism are the queues that are used to pass messages between processes Python provides a default implementation

signal and slot Signals and slots are loosely coupled: A class which emits a signal neither knows nor cares which slots receive the signal Qt's signals and slots mechanism