[FIXED] How can I initialize the new pyqt window?

Issue

1. Click on the main window (A) to open a new window (B).
2. Save the value at B. The example code saved the name through fileopen.
3. If you close B and open B again through a click, the previously saved value remains.

All I want is to click and reset all the values.

Also, even if A is shut down while B is open, B remains.

I also want to know how to solve this problem.

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

class CombineClass(QDialog):
    def __init__(self, parent=None):
        super(CombineClass, self).__init__(parent)
        self.initUI()

    def initUI(self):
        self.setWindowFlag(Qt.WindowContextHelpButtonHint, False)


        self.label = QPushButton("file name", self)
        self.label.clicked.connect(self.fileselect)
        self.label.move(150,100)

        self.label2 = QLabel("print", self)
        self.label2.move(50,100)

        self.setWindowTitle("combine")
        self.resize(300, 200)
        self.center()
    def fileselect(self):

        filename = QFileDialog.getOpenFileNames(self, "Open Files", "C:\\Users\\", "(*.txt)")
        self.label2.setText(filename[0][0])

    def center(self):
        qr = self.frameGeometry()
        cp = QDesktopWidget().availableGeometry().center()
        qr.moveCenter(cp)
        self.move(qr.topLeft())


class MyApp(QWidget):
    def __init__(self):
        super().__init__()
        self.initUI()

        self.combine = CombineClass()
    def initUI(self):
        self.fileselect = QPushButton("파일", self)
        self.fileselect.clicked.connect(self.combine)
        self.setWindowTitle("Text Master")
        self.resize(600, 600)
        self.center()
        self.show()
    def combine(self):
        self.combine.show()

    def center(self):
        qr = self.frameGeometry()
        cp = QDesktopWidget().availableGeometry().center()
        qr.moveCenter(cp)
        self.move(qr.topLeft())

if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = MyApp()
    sys.exit(app.exec_())

Solution

The logic is really simple: create a method that sets the default values and then call that before displaying the window:

class CombineClass(QDialog):
    # ...
    def reset(self):
        self.label2.clear()
    # ...

class MyApp(QWidget):
    # ...
    def combine(self):
        self.combine.reset()
        self.combine.show()
    # ...

Another possible solution is to create the dialog whenever it is required:

class MyApp(QWidget):
    def __init__(self):
        super().__init__()
        self.initUI()
        # self.combine = CombineClass()

    def initUI(self):
        self.fileselect = QPushButton("파일", self)
        self.fileselect.clicked.connect(self.combine)
        self.setWindowTitle("Text Master")
        self.resize(600, 600)
        self.center()
        self.show()

    def combine(self):
        self.combine = CombineClass()
        self.combine.show()
        print("after close")

    def center(self):
        qr = self.frameGeometry()
        cp = QDesktopWidget().availableGeometry().center()
        qr.moveCenter(cp)
        self.move(qr.topLeft())

Answered By - eyllanesc