Python 中PyQt5 点击主窗口弹出另一个窗口的实现方法

from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
  def setupUi(self, MainWindow):
    MainWindow.setObjectName("MainWindow")
    MainWindow.resize(954, 530)
    self.centralwidget = QtWidgets.QWidget(MainWindow)
    self.centralwidget.setObjectName("centralwidget")
    self.toolButton = QtWidgets.QToolButton(self.centralwidget)
    self.toolButton.setGeometry(QtCore.QRect(10, 40, 101, 25))   self.toolButton.setObjectName("toolButton")
    ...1234567891011

from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_Dialog(object):
  def setupUi(self, Dialog):
    Dialog.setObjectName("Dialog")
    Dialog.resize(810, 474)
    self.label_5 = QtWidgets.QLabel(Dialog)
    self.label_5.setGeometry(QtCore.QRect(630, 90, 151, 151))
    self.label_5.setObjectName("label_5")
    self.label_2 = QtWidgets.QLabel(Dialog)
    self.label_2.setGeometry(QtCore.QRect(250, 90, 171, 161))
    self.label_2.setObjectName
("label_2")
        ...12345678910111213

from Eyetracking_main import *
from Eyetracking_process import *
from PyQt5.QtWidgets import QApplication,QMainWindow,QDialog
import sys
class parentWindow(QMainWindow):
  def __init__(self):
    QMainWindow.__init__(self)
    self.main_ui = Ui_MainWindow()
    self.main_ui.setupUi(self)
class childWindow(QDialog):
  def __init__(self):
    QDialog.__init__(self)
    self.child=Ui_Dialog()
    self.child.setupUi(self)

if __name__=='__main__':
  app=QApplication(sys.argv)
  window=parentWindow()
  child=childWindow()
  #通过toolButton将两个窗体关联
  btn=window.main_ui.toolButton
  btn.clicked.connect(child.show)
  # 显示
  window.show()
  sys.exit(app.exec_())

class parentWindow(QMainWindow):
  def __init__(self):
    QMainWindow.__init__(self)#QMainWindow的初始化
    self.main_ui = Ui_MainWindow()#主窗口的实例化
    self.main_ui.setupUi(self)
class childWindow(QDialog):
  def __init__(self):
    QDialog.__init__(self)
    self.child=Ui_Dialog()#子窗口的实例化
    self.child.setupUi(self)

window=parentWindow()
child=childWindow()

btn=window.main_ui.toolButton
btn.clicked.connect(child.show)