pyQT5 实现窗体之间传值的示例

# -*- coding: utf-8 -*-
 
from PyQt5 import QtWidgets
from main_windows import Ui_MainWindow
import sys
from wid_defs import my_widgets
from dlg_defs import my_Dialog
 
class MyWindow(QtWidgets.QMainWindow,Ui_MainWindow):
  def __init__(self):
    super(MyWindow,self).__init__()
    self.setupUi(self)
    
  def openDialog(self):
     self.dlg = my_Dialog()
     www = self.textEdit.toPlainText()
     self.dlg.setT(www)
     self.dlg.exec_()  
    
  def openWidget(self):
    self.wid = my_widgets()
    self.wid.pushButton.clicked.connect(self.GetText)
    www= self.textEdit.toPlainText()
    self.wid.setT(www)    
    self.wid.show() #close wid form
    
    
  def GetText(self):
    self.textEdit.setText(self.wid.textEdit.toPlainText())   
    self.wid.close() 
    
if __name__ == "__main__":
  app = QtWidgets.QApplication(sys.argv)
  mainWindow = MyWindow()
  mainWindow.show()
  sys.exit(app.exec_())    

def slot3(self):
     self.dlg = my_Dialog()
     www = self.textEdit.toPlainText()
     self.dlg.setT(www)
     self.dlg.exec_()  

  def slot2(self):
    #widgetForm
    self.wid = my_widgets()
    self.wid.pushButton.clicked.connect(self.GetLine)
    
    #dialog
    self.dlg = my_Dialog()
    self.dlg.buttonBox.accepted.connect(self.GetLine)
    
    www= self.textEdit.toPlainText()
    self.wid.setT(www)    
    self.wid.show()
 
  def GetText(self):
    self.textEdit.setText(self.wid.textEdit.toPlainText())

 def GetLine(self):
    self.textEdit.setText(self.dlg.textEdit.toPlainText())