如何将变量从我的前端文件调用到我的后端文件

Question

我想从我的前端（front_ui.py）调用我的后端文件（back_ui.py）中的“self.primaryButton”。 我想访问前端中的所有 UI/变量，并在后端代码中添加必要的功能。 就像调用按钮和做某事的 function 一样。

Bellow是我的前端文件（front_ui.py）：

from PyQt5.QtGui import *
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
import os
import sys


class MainWindow(object):
  def setupUI(self, mainWindow):
    mainWindow.setWindowTitle('Front - UI')
    mainWindow.setMinimumWidth(500)
    mainWindow.setMinimumHeight(500)
    mainWindowLayout = QHBoxLayout()
    mainWindowLayout.setContentsMargins(0, 
    0, 0, 0)
    mainWindowLayout.setSpacing(0)
    self.mainWindowLayout = QHBoxLayout()
   self.mainWindowLayout.setContentsMargins(0, 0, 0, 0)
    self.mainWindowLayout.setSpacing(0)

    self.mainFrame1 = QFrame()
    self.mainFrame1.setStyleSheet('QFrame {background-color: rgb(50,150,200)}')
    self.mainFrame1.setMaximumWidth(250)
    self.mainFrame1Layout = QVBoxLayout()
    self.mainFrame1Layout.setContentsMargins(2, 2, 2, 2)
    self.secondaryFrame1 = QFrame()
    self.secondaryFrame1.setMaximumHeight(50)
    self.secondaryFrame1Layout = QVBoxLayout()

    self.primaryButton = QPushButton()
    self.primaryButton.setText('=')
    self.secondaryFrame1Layout.addWidget(self.primaryButton)
    self.secondaryFrame1.setLayout(self.secondaryFrame1Layout)

    self.secondaryFrame2 = QFrame()
    self.secondaryFrame2Layout = QVBoxLayout()
    self.secondaryButton1 = QPushButton()
    self.secondaryButton1.setText('Button 1')
    self.secondaryButton2 = QPushButton()
    self.secondaryButton2.setText('Button 2')
    self.secondaryButton3 = QPushButton()
    self.secondaryButton3.setText('Button 3')
    self.secondaryButton4 = QPushButton()
    self.secondaryButton4.setText('Button 4')
    self.secondaryButton5 = QPushButton()
    self.secondaryButton5.setText('Button 5')
    self.secondaryFrame2Layout.addWidget(self.secondaryButton1)
    self.secondaryFrame2Layout.addWidget(self.secondaryButton2)
    self.secondaryFrame2Layout.addWidget(self.secondaryButton3)
    self.secondaryFrame2Layout.addWidget(self.secondaryButton4)
    self.secondaryFrame2Layout.addWidget(self.secondaryButton5)
    self.secondaryFrame2.setLayout(self.secondaryFrame2Layout)

    self.mainFrame1Layout.addWidget(self.secondaryFrame1)
    self.mainFrame1Layout.addWidget(self.secondaryFrame2)
    self.mainFrame1.setLayout(self.mainFrame1Layout)

    self.mainFrame2 = QFrame()
    self.mainFrame2.setStyleSheet('QFrame {background-color: rgb(20,100,250)}')

    
    mainWindowLayout.addWidget(self.mainFrame1)
    mainWindowLayout.addWidget(self.mainFrame2)
    mainWindow.setLayout(mainWindowLayout)




if __name__ == '__main__':
    front_Application = QApplication(sys.argv)
    front_Application.setStyle('Fusion')
    front_Widget = QWidget()
    front_UI_Window = MainWindow()
    front_UI_Window.setupUI(front_Widget)
    front_Widget.show()
    sys.exit(front_Application.exec_())

下面是我的后端文件（back_ui.py）。 我想在后端控制/调用前端按钮（self.primaryButton）：

from PyQt5.QtGui import *
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
import os
import sys
from front import front_ui


class MainWindow_Back(QWidget):
    def __init__(self):
        super().__init__()
        self.setMinimumSize(QSize(500, 500))
        self.setWindowTitle('Back End')
        self.back_Layout = QVBoxLayout()
        self.back_Layout.setContentsMargins(0, 0, 0, 0)
        self.back_Layout.setSpacing(0)
        self.setupUI()
        self.setLayout(self.back_Layout)

    def setupUI(self):
        self.frame1 = QFrame()
        self.frame1.setMaximumHeight(50)
        self.frame1.setStyleSheet('QFrame {background-color: rgb(250,50,100)}')
        self.frame1Layout = QHBoxLayout()
        self.frame1Layout.setContentsMargins(0, 0, 0, 0)
        accessBackEnd = front_ui.MainWindow().primaryButton()   # This is where I want to place the button
        self.frame1Layout.addWidget(accessBackEnd)
        self.frame1.setLayout(self.frame1Layout)



        self.frame2 = QFrame()
        self.frame2.setStyleSheet('QFrame {background-color: rgb(50,100,250)}')
        self.back_Layout.addWidget(self.frame1)
        self.back_Layout.addWidget(self.frame2)



if __name__ == '__main__':
    back_Application = QApplication(sys.argv)
    back_Application.setStyle('Fusion')
    back_Widget = MainWindow_Back()
    back_Widget.show()
    sys.exit(back_Application.exec_())