void QMetaObject::connectSlotsByName(QObject *object)

Searches recursively for all child objects of the given object, and connects matching signals from them to slots of object that follow the following form:

void on_<object name>_<signal name>(<signal parameters>);

Let's assume our object has a child object of type QPushButton with the object name button1. The slot to catch the button's clicked() signal would be:

void on_button1_clicked();

If object itself has a properly set object name, its own signals are also connected to its respective slots.

Пример:

QtCore.QMetaObject.connectSlotsByName(CalculatorForm)