Simple Python List App Using PySide6

pyList.py

#Simple List In Python Using Pyside6 GUI Library

import sys
import os
from PySide6.QtWidgets import QApplication, QWidget, QPushButton, QLineEdit, QListWidget, QMessageBox, QFileDialog, QMenu, QSystemTrayIcon
from PySide6.QtCore import Qt, QSize, QFile, QTextStream
from PySide6.QtGui import QPixmap, QIcon
import myResources

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

    def initUI(self):
        self.setWindowTitle("PyList")
        self.setFixedSize(350, 550)
        self.icon = QIcon()
        self.icon.addFile(":icon.png", QSize(32,32), QIcon.Normal, QIcon.Off)
        self.pixmap = QPixmap(":icon.png")
        self.icon.addPixmap(self.pixmap, QIcon.Normal, QIcon.Off)
        self.setWindowIcon(self.icon)

        print("Creating menu...")
        menu = QMenu()
        saveAction = menu.addAction("Save List")
        saveAction.triggered.connect(self.saveList)
        loadAction = menu.addAction("Load List")
        loadAction.triggered.connect(self.loadList)
        clearAction = menu.addAction("Clear List")
        clearAction.triggered.connect(self.clearList)
        quitAction = menu.addAction("Quit")
        quitAction.triggered.connect(self.quitApp)

        print("Creating tray...")
        trayIcon = QSystemTrayIcon(self.icon, app)
        trayIcon.setContextMenu(menu)

        print("Showing tray...")
        trayIcon.show()
        trayIcon.setToolTip("PyList!")
        #trayIcon.showMessage("PyList", "Thank You For Using PyList!", msecs=5000)

        self.txtBox = QLineEdit(self)
        self.myList = QListWidget(self)

        # Save Button
        self.btnSave = QPushButton("Save List", self)
        self.btnSave.resize(250, 50)
        self.btnSave.move(50, 500)
        self.btnSave.clicked.connect(self.saveList)

        # Load Button
        self.btnLoad = QPushButton("Load List", self)
        self.btnLoad.resize(250, 50)
        self.btnLoad.move(50, 450)
        self.btnLoad.clicked.connect(self.loadList)

        # Clear Button
        self.btnClear = QPushButton("Clear List", self)
        self.btnClear.resize(250, 35)
        self.btnClear.move(50, 5)
        self.btnClear.clicked.connect(self.clearList)

        # Add Button
        self.btnAdd = QPushButton("Add Item!", self)
        self.btnAdd.resize(250, 50)
        self.btnAdd.move(50, 400)
        self.btnAdd.clicked.connect(self.btnAddClicked)

        # List
        self.myList.move(50, 50)
        self.myList.resize(250, 300)
        self.txtBox.move(50, 360)
        self.txtBox.resize(250, 32)

        self.myList.itemClicked.connect(self.delItem)

        #self.show()

    def clearList(self):
        self.myList.clear()

    def delItem(self, item):
        try:
            self.myList.takeItem(self.myList.row(item))
        except Exception as e:
            print(f"Error deleting item: {e}")

    def btnAddClicked(self):
        item_text = self.txtBox.text()
        if item_text:
            if self.myList.findItems(item_text, Qt.MatchContains):
                print("Item Already Exists In List.")
                msg = QMessageBox()
                msg.setIcon(QMessageBox.Information)
                msg.setText("Item Already Exists In List.")
                msg.setWindowTitle("PyList")
                msg.setStandardButtons(QMessageBox.Ok)
                msg.exec_()
                self.txtBox.clear()
            else:
                self.myList.addItem(item_text)
                self.txtBox.clear()
                print(f"Item: {item_text} Added To List!")
        self.txtBox.setFocus()

    #Load A List From A File
    def loadList(self):

        options = QFileDialog.Options()
        file_path, _ = QFileDialog.getOpenFileName(self, "Load File", "", "List Files (*.lst);;All Files (*)", options=options)
        try:
            if not file_path:
                print("File Does Not Exist!")
                QMessageBox.information(self, "PyList", "List File Does Not Exist!")
                return
            with open(file_path, 'r', encoding='UTF-8') as file:
                for line in file:
                    self.myList.addItem(line.rstrip())
                    print(f"Item: {line.rstrip()} Loaded From File: {file_path}")
            file.close()
            print("List Loaded!")
        except Exception as e:
            print(f"Error loading list: {e}")
            QMessageBox.critical(self, "Error", f"Failed to load file: {e}")

    #Save List With Custom File Name (For Saving Multiple Lists)
    def saveList(self):

        options = QFileDialog.Options()
        file_path, _ = QFileDialog.getSaveFileName(self, "Save File", "", "List Files (*.lst);;All Files (*)", options=options)

        if file_path is None or file_path == "":
            print("Save Aborted")
        try:
            if not os.path.exists(file_path):
                print("File Does Not Exist! Creating a new one.")
                with open(file_path, 'w', encoding='UTF-8') as file:
                    file.write("")
                    file.close()
                with open(file_path, 'w', encoding='UTF-8') as file:
                    for i in range(self.myList.count()):
                        line = self.myList.item(i).text()
                        file.write(line + "\n")
                print("List Saved!")
                file.close()
                self.change_extension(file_path, ".lst")
                QMessageBox.information(self, "Success", f"File saved at: {file_path}")

        except Exception as e:

            if "2" in str(e):
                print("File Does Not Exit, User Cancled Saving List")
            else:
                QMessageBox.critical(self, "Error", f"Failed to save file: {e}")

    #Bind Enter Key To Add Item Button
    def keyPressEvent(self, event):
        if event.key() in (Qt.Key_Return, Qt.Key_Enter):
            self.btnAddClicked()
        super().keyPressEvent(event)

    #Change/Append File Extension To .lst
    def change_extension(self, file_path, new_extension):
        base_name, _ = os.path.splitext(file_path)
        new_file_path = base_name + new_extension
        os.rename(file_path, new_file_path)

    def quitApp(self):
        msg = QMessageBox()
        msg.setIcon(QMessageBox.Question)
        msg.setText("Save List Before Quitting?")
        msg.setWindowTitle("PyList")
        msg.setStandardButtons(QMessageBox.Yes | QMessageBox.No)
        msg.setDefaultButton(QMessageBox.No)
        msg.buttonClicked.connect(self.quitClicked)
        msg.exec_()

    def quitClicked(self, button):
        print("Button Clicked: ",button.text())
        if button.text() == "Yes":
            print(f"Saveing List To File: {self.file_path}")
            try:
                self.saveList()
            except Exception as e:
                print(f"Error saving list: {e}")
            QApplication.quit()
            sys.exit()
        else:
            print("Not Saving List.")
            QApplication.quit()
            sys.exit()

    def test_action(self):
        print("Test Action!")
        msg = QMessageBox()
        msg.setIcon(QMessageBox.Information)
        msg.setText("Test Action OK!")
        msg.setWindowTitle("PyList")
        msg.setStandardButtons(QMessageBox.Ok)
        msg.exec_()

if __name__ == "__main__":
    app = QApplication(sys.argv)
    window = PyListApp()
    window.show()
    sys.exit(app.exec())

myResources.txt, needs to be converted to RCC file named myResources.py

<RCC version="1.0"> <qresource> <file>icon.png</file> </qresource> </RCC>