Eu tenho um método chamado 'test ()' que carrega 3 tabelas de uma linha em uma barra de rolagem.

Por alguma razão que não consigo descobrir, no entanto, enquanto funciona se eu simplesmente ativar test () no carregamento, não funcionará se eu comentar e tentar ativá-lo pressionando um botão.

Aqui está o módulo principal (com test ())

from PyQt5 import QtCore, QtWidgets
from design import Ui_MainWindow

class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
    def __init__(self, *args, **kwargs):
        QtWidgets.QMainWindow.__init__(self, *args, **kwargs)
        self.setupUi(self)
        #test(self)

def test(self):
    from random import randint
    x = randint(0, 99)
    print(x)
    height = 30
    yPos = 0
    for i in range(3):

        rowVals = ['test%s' % str(x + i)]

        qTbl = QtWidgets.QTableWidget(self.sawDoc)
        qTbl.setObjectName("tbl%s" % (i))
        qTbl.setGeometry(QtCore.QRect(0, yPos, 880, height))
        qTbl.horizontalHeader().setVisible(False)
        qTbl.verticalHeader().setVisible(False)
        yPos += height

        qTbl.setRowCount(1)
        qTbl.setColumnCount(len(rowVals))
        for r, cell in enumerate(rowVals):
            item = QtWidgets.QTableWidgetItem()
            item.setText(str(cell))
            qTbl.setItem(0, r, item)

if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    w = MainWindow()
    w.show()
    sys.exit(app.exec_())

E aqui está o módulo de design (com o botão)

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(896, 453)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.scrDoc = QtWidgets.QScrollArea(self.centralwidget)
        self.scrDoc.setGeometry(QtCore.QRect(0, 0, 891, 391))
        self.scrDoc.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOn)
        self.scrDoc.setHorizontalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
        self.scrDoc.setWidgetResizable(False)
        self.scrDoc.setObjectName("scrTest")
        self.sawDoc = QtWidgets.QWidget()
        self.sawDoc.setGeometry(QtCore.QRect(0, 0, 869, 300))
        self.sawDoc.setObjectName("sawDoc")
        self.scrDoc.setWidget(self.sawDoc)
        self.btnTest = QtWidgets.QPushButton(self.centralwidget)
        self.btnTest.setGeometry(QtCore.QRect(430, 400, 80, 15))
        self.btnTest.setObjectName("btnTest")
        MainWindow.setCentralWidget(self.centralwidget)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

        self.btnTest.clicked.connect(self.test)

    def test(self):
        import main
        main.test(self)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "昊珩のCAT工具"))
        self.btnTest.setText(_translate("MainWindow", "Test"))



if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    MainWindow = QtWidgets.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())

Simplesmente nada acontece quando pressiono o botão (exceto se a impressão estiver funcionando com êxito).

Alguém pode dizer o que há de errado?