How can I combine in one file multiple .py and.ui files?

Question

I have bilingual application. In QtDesigner I made two interfaces: gui_eng.ui and gui_rus.ui. For each of them exist main_gui_eng.py and main_gui_rus.py files with configuration code of those .ui files. What is more, there exists main.py file (from which is started main_gui_eng.py or main_gui_rus.py according to last time closed). main.py will be converted to .exe file. In each file I use following way to connect with .ui:

main_window = uic.loadUiType('gui_eng.ui')[0]
class WIZWindow(QMainWindow, main_window):   

Problem: How could I connect them this way? If I write in main.py:

import main_gui_eng

it does not open needed .ui file...

Answer 1

1 pyuic5 gui_eng.ui -o gui_eng.py

2 pyuic5 gui_rus.ui -o gui_rus.py

3 python main_eng_rus.py

4 pyinstaller -c -F main_eng_rus.py

5 main_eng_rus.exe

---

main_gui_eng.py

from PyQt5.QtWidgets import QMainWindow, QApplication

# pyuic5 gui_eng.ui -o gui_eng.py
from gui_eng import Ui_MainWindow


class Window(QMainWindow, Ui_MainWindow):
    def __init__(self, parent=None):
        super(Window, self).__init__(parent)
        self.parent = parent

        self.setupUi(self)

    def closeEvent(self, event):
        self.hide()
        self.parent.show()


if __name__ == '__main__':
    import sys
    app = QApplication(sys.argv)
    w = Window()
    w.setWindowTitle("main_gui_eng.py")
    w.show()
    sys.exit(app.exec_())        

main_gui_rus.py

from PyQt5.QtWidgets import QMainWindow, QApplication

# pyuic5 gui_rus.ui -o gui_rus.py
from gui_rus import Ui_MainWindow


class Window(QMainWindow, Ui_MainWindow):
    def __init__(self, parent=None):
        super(Window, self).__init__(parent)
        self.parent = parent 

        self.setupUi(self)

    def closeEvent(self, event):
        self.hide()
        self.parent.show()


if __name__ == '__main__':
    import sys
    app = QApplication(sys.argv)
    w = Window()
    w.setWindowTitle("main_gui_rus.py")
    w.show()
    sys.exit(app.exec_())        

main_eng_rus.py

from PyQt5.QtWidgets import (QMainWindow, QApplication, QPushButton, 
                             QWidget, QGridLayout)

from main_gui_eng import Window as gui_eng
from main_gui_rus import Window as gui_rus


class MainWindow(QMainWindow):
    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent)

        centralWidget = QWidget()
        self.setCentralWidget(centralWidget)

        self.button_eng = QPushButton('Open main_gui_eng.py')
        self.button_eng.clicked.connect(self.open_gui_eng)
        self.button_rus = QPushButton('Open main_gui_rus.py')
        self.button_rus.clicked.connect(self.open_gui_rus)

        self.grid = QGridLayout(centralWidget)
        self.grid.addWidget(self.button_eng, 0, 0)         
        self.grid.addWidget(self.button_rus, 0, 1)

    def open_gui_eng(self):
        self.mainGuiEng = gui_eng(self)
        self.mainGuiEng.show()
        self.hide()

    def open_gui_rus(self):
        self.mainGuiRus = gui_rus(self)
        self.mainGuiRus.show()
        self.hide()


if __name__ == '__main__':
    import sys
    app = QApplication(sys.argv)
    w = MainWindow()
    w.setWindowTitle("main_eng_rus.py")
    w.show()
    sys.exit(app.exec_())