How to pass a variable to another class?

Question

PyQt

I can't pass the row_numberSU variable from class BaseWindow to AmplyWindow in any way.
The purpose of all this is to keep track of the row number of the double-clicked row.

spoiler

import sys
import os, os.path
from PyQt5 import QtCore, QtGui, QtWidgets
import gui
from docxtpl import DocxTemplate
import sqlite3
from AmplyWindow import Ui_AmplyWindow 

    



class BaseWindow(QtWidgets.QMainWindow, gui.Ui_MainWindow, DocxTemplate):
    def __init__(self):
        super().__init__()
        self.setupUi(self)
        
        self.loadData()
        self.action_interface()
        
        self.liststud.doubleClicked.connect(self.OpenAmpWin)   
        for idx in self.liststud.selectionModel().selectedIndexes():
            row_numberSU = idx.row()
            return row_numberSU 
        
    def action_interface(self):
        self.butupd.clicked.connect(self.loadData)
        self.exit.clicked.connect(self.close)
        self.save.clicked.connect(self.active) 

             
    def OpenAmpWin(self):
        self.AmpWinShow = AmplyWindow()
        self.AmpWinShow.show()
       
    def loadData(self):
        Connection = sqlite3.connect('datam.db')
        query = "SELECT * FROM Sbase"
        result = Connection.execute(query)
        self.liststud.setRowCount(0)
        for row_number, row_data in enumerate(result):
            self.liststud.insertRow(row_number)
            for colum_number, data in enumerate(row_data):
                self.liststud.setItem(row_number, colum_number, QtWidgets.QTableWidgetItem(str(data)))    
        Connection.close()
        self.liststud.setHorizontalHeaderLabels(["№","Фамилия","Имя","Отчество","Дата рождения","Специальность"])     
        
    def active(self):
        AFam = self.AFam.text()
        AImy = self.AImy.text()
        AOtch = self.AOtch.text()
        patternpath = r'.\pattern\1.docx'
        savepath = r'.\resdoc\done.docx'
        doc = DocxTemplate(patternpath)
        context = { 'AFam' : AFam , 'AImy' : AImy, 'AOtch' : AOtch}
        doc.render(context)
        doc.save(savepath) 

class AmplyWindow(BaseWindow, QtWidgets.QWidget, Ui_AmplyWindow):
    def __init__(self):
        super().__init__()
        self.setupUi(self)
        self.AmpWinAct()                

    def AmpWinAct(self, row_numberSU):
        condb = sqlite3.connect('datam.db')
        cursor = condb.cursor()
        querydb = """SELECT fam, imy, otch, dateb, sts FROM Sbase WHERE row = ?"""
        cursor.execute(querydb,(row_numberSU))
        data = cursor.fetchall()
        for row in data: 
            a=row[0]
            b=row[1]
            c=row[2]
            d=row[3]
            e=row[4]
        cursor.close()
        self.abfam.setText(a)
        self.abimy.setText(b)
        self.abotch.setText(c)
        self.abdate.setText(d)
        self.status.setCurrentText(e)    


        
if __name__ == '__main__':
    app = QtWidgets.QApplication(sys.argv)  
    window = BaseWindow()  
    window.show()
    app.exec()

Answer 1

alas, no way