hiding a QLabel at default

[prosperrr]

am building a car dealership app and id like to know how to hide a qlabel at default until an error occurs it display the label and displays the error

the signup section

self.labelImg = self.findChild(QLabel, 'error_label')

    self.labelInp.hide()
    self.labelImg.hide()

from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
from PyQt5.uic import loadUi
import sys
import sqlite3
import re
import os

db = sqlite3.connect('CAR.db')
exe = db.cursor()


exe.execute("""CREATE TABLE IF NOT EXISTS Login(
    email VARCHAR NOT NULL,
    role TEXT,
    password TEXT);""")

exe.execute("""CREATE TABLE IF NOT EXISTS Signup(
    email VARCHAR NOT NULL,
    role TEXT,
    firstName TEXT NOT NULL,
    LastName TEXT NOT NULL,
    password TEXT);""")


class CARLOAD(QDialog):
    def __init__(self, parent=None):
        super().__init__(parent)
        loadUi("VLogin.ui", self)
        self.loginbutton = self.findChild(QPushButton, 'login_btn')
        self.signupbutton = self.findChild(QPushButton, 'signup_btn')

        self.signupbutton.clicked.connect(self.Signup)
        self.loginbutton.clicked.connect(self.Login)

    def Login(self):
        self.hide()
        login_page = LoginPage()
        login_page.exec_()

    def Signup(self):
        self.hide()
        signup_page = SignupPage()
        signup_page.exec_()


class SignupPage(QDialog):
    def __init__(self, parent=None):
        super().__init__(parent)
        loadUi('VSignup.ui', self)

        self.firstname = self.findChild(QLineEdit, 'first_name')
        self.lastname = self.findChild(QLineEdit, 'last_name')
        self.password = self.findChild(QLineEdit, 'pass')
        self.confirm_pass = self.findChild(QLineEdit, 'conf_pass')
        self.register = self.findChild(QPushButton, 'signup_btn')
        self.backtologin = self.findChild(QPushButton, 'bck_login')
        self.labelInp = self.findChild(QLabel, 'error_inp')
        self.labelImg = self.findChild(QLabel, 'error_label')

        self.labelInp.hide()
        self.labelImg.hide()

        self.register.clicked.connect(self.welcome)
        self.backtologin.clicked.connect(self.home)





    def home(self):
        self.hide()
        home = CARLOAD()
        home.exec_()

    def welcome(self):
        self.hide()
        welcome_page = welcomePage()
        welcome_page.exec_()


class LoginPage(QDialog):
    def __init__(self, parent=None):
        super().__init__(parent)
        loadUi('VLogin1.ui', self)
        self.emailinput = self.findChild(QLineEdit, 'email_inp')
        self.passwordinput = self.findChild(QLineEdit, 'pass_inp')
        self.bcksng = self.findChild(QPushButton, 'back_sng')
        self.loginBtn = self.findChild(QPushButton, 'login_btn')

        self.bcksng.clicked.connect(self.home)



    def home(self):
        self.hide()
        home = CARLOAD()
        home.exec_()


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

        loadUi('VWelcome.ui', self)
        self.loader = self.findChild(QProgressBar, 'progressBar')
        self.update = self.findChild(QLabel, 'update')



        self.timer = QTimer(self)
        self.timer.timeout.connect(self.progressUp)
        self.timer.start(100)

    def home(self):
        self.hide()
        home = CARLOAD()
        home.exec_()

    def progressUp(self):
        current_value = self.loader.value()  # Get the current value of the progress bar

        # Increase the value by 5
        if current_value < 100:
            self.loader.setValue(current_value + 1)

        # Update the text based on the current progress value
        if 20 <= current_value < 40:
            self.update.setText(f'Loading Interface... {current_value}%')

        elif 40 <= current_value < 60:
            self.update.setText(f'Loading Components... {current_value}%')

        elif 60 <= current_value < 80:
            self.update.setText(f'Almost there... {current_value}%')

        elif 80 <= current_value < 90:
            self.update.setText(f'Setting up Dashboard... {current_value}%')

        # When the progress bar reaches 100, stop the timer and show the completion message
        elif current_value == 100:
            self.timer.stop()
            self.update.setText("Setup Complete! 100%")
            self.home()




        # else:
        #     self.timer.stop()
        #     self.progressUp.setText("Setup Complete!")









# class CARLOAD(QDialog):
#     def __init__(self, paren=None):
#         super().__init__(parent=None)
#         loadUi("CARLogin.ui", self)
#
#         self.loginbutton = self.findChild(QPushButton, 'login_btn')
#
#         self.loginbutton.clicked.connect(self.welcome)
#     def welcome(self):
#         self.hide()
#         self.welcome_window = WELCOME()
#         self.welcome_window.show()


# class WELCOME(QDialog):
#     def __init__(self, parent=None):
#         super().__init__(parent)
#         loadUi('CARPage1.ui', self)





# Running the application
if __name__ == "__main__":
    app = QApplication(sys.argv)
    window = CARLOAD()
    window.show()
    sys.exit(app.exec_())

[SGaist]

Hi and welcome to devnet,

How are you setting up your label ?

On a side note, I would recommend you take the time to re-evaluate your architecture. Your chain of dialogs is currently pretty brittle.
There are other ways to switch from one widget to another that does not involve creating a new widget every time.
Check for example QStackedWidget.
You might want to also consider QMainWindow which provides a status bar.
Depending on the error you might want to consider a QMessageBox using the appropriate level of urgency to show the message.