MainWindow와 DIalog 상호작용

import sys
from PyQt5.QtWidgets import *
from PyQt5.QtGui import *
 
class LogInDialog(QDialog):
    def __init__(self):
        super().__init__()
        self.setupUI()
 
        self.id = None
        self.password = None
 
    def setupUI(self):
        self.setGeometry(1100, 200, 300, 100)
        self.setWindowTitle("Sign In")
        self.setWindowIcon(QIcon('icon.png'))
 
        label1 = QLabel("ID: ")
        label2 = QLabel("Password: ")
 
        self.lineEdit1 = QLineEdit()
        self.lineEdit2 = QLineEdit()
        self.pushButton1= QPushButton("Sign In")
        self.pushButton1.clicked.connect(self.pushButtonClicked)
 
        layout = QGridLayout()
        layout.addWidget(label1, 0, 0)
        layout.addWidget(self.lineEdit1, 0, 1)
        layout.addWidget(self.pushButton1, 0, 2)
        layout.addWidget(label2, 1, 0)
        layout.addWidget(self.lineEdit2, 1, 1)
 
        self.setLayout(layout)
 
    def pushButtonClicked(self):
        self.id = self.lineEdit1.text()
        self.password = self.lineEdit2.text()
        self.close()
 
class MyWindow(QWidget):
    def __init__(self):
        super().__init__()
        self.setupUI()
 
    def setupUI(self):
        self.setGeometry(800, 200, 300, 300)
        self.setWindowTitle("PyStock v0.1")
        self.setWindowIcon(QIcon('icon.png'))
 
        self.pushButton = QPushButton("Sign In")
        self.pushButton.clicked.connect(self.pushButtonClicked)
        self.label = QLabel()
 
        layout = QVBoxLayout()
        layout.addWidget(self.pushButton)
        layout.addWidget(self.label)
 
        self.setLayout(layout)
 
    def pushButtonClicked(self):
        dlg = LogInDialog()
        dlg.exec_()
        id = dlg.id
        password = dlg.password
        self.label.setText("id: %s password: %s" % (id, password))
 
if __name__ == "__main__":
    app = QApplication(sys.argv)
    window = MyWindow()
    window.show()
    app.exec_()