# mainwindow.py
from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(600, 400)
        self.tableWidget = QtWidgets.QTableWidget(MainWindow)
        self.tableWidget.setObjectName("tableWidget")
        self.tableWidget.setColumnCount(10)
        self.tableWidget.setRowCount(10)
        # hide QTableWidgetItem generation code here
        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        # hide some code here

In general, I need to create a new class which is derived from the class above to realize the response of every widget. My code would be like:

# mymainwindow.py
from PyQt5 import QtCore, QtWidgets
from mainwindow import Ui_MainWindow

class MyMainWindow(QtWidgets.QDialog, Ui_MainWindow):
    def __init__(self, parent=None):
        super(MyMainWindow, self).__init__(parent)
        self.data = read_list_from_external_file()
        self.setupUi(self)

    def setupUi(self, my_mainwindow):
        super(MyDialog, self).setupUi(my_mainwindow)
        for row in range(self.tableWidget.rowCount()):
            for col in range(self.tableWidget.columnCount()):
                self.tableWidget.setItem(row, col, QtWidgets.QTableWidgetItem(self.data[row][col]))

    @QtCore.pyqtSlot(int, int)
    def on_tableWidget_cellChanged(self, row, col):
        # some response on cell changed

In my code, the slot method on_tableWidget_cellChanged() will be executed when I fill in tableWidget, but I don't want to do that in setup stage. The key point is that connectSlotsByName() needs to be executed after setup stage. Of course I can use tableWidget.blockSignals(), or give up using decorator and connect manually. But actually there are dozens of widgets in my application, neither solution looks like the "best" one in my mind. I expect a way to avoid generating connectSlotsByName() automatically, then I can add it in the end of setupUi() of MyMainWindow manually.
Then I found in Qt Designer, there is a option to control whether connectSlotsByName() is added in the code.

If I uncheck this option, the header of .ui file will be modified from

<ui version="4.0">

to

<ui version="4.0" connectslotsbyname="false">

But it seems like pyuic5 doesn't recognize this change. connectSlotsByName() is still there. Is there a way to avoid pyuic5 generating connectSlotsByName() automatically? Or is there an "elegant" way to avoid slot methods executing in setup stage?