Not the perfect code but it is working fine login form PyQt4

[A Former User]

import sys
import os
import mysql.connector
from PyQt4.QtGui import *
from PyQt4.QtCore import *
from PyQt4.QtSql import *

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

        self.db = QSqlDatabase.addDatabase("QMYSQL")
        self.db.setHostName("localhost")
        self.db.setDatabaseName("user")
        self.db.setUserName("root")
        self.db.setPassword("admingelo")
        self.db.open()

        self.username = QLineEdit(self)
        self.QUserLabel = QLabel("USERNAME")

        self.password = QLineEdit(self)
        self.QPasswordLabel = QLabel("PASSWORD")
        self.password.setEchoMode(QLineEdit.Password)

        self.btn_Submit = QPushButton("LOGIN")

        layout = QFormLayout()
        layout.addRow(self.QUserLabel,self.username)
        layout.addRow(self.QPasswordLabel,self.password)
        layout.addRow(self.btn_Submit)

        self.setLayout(layout)

        self.connect(self.btn_Submit, SIGNAL("clicked()"),self.Submit_btn)

    def Submit_btn(self):
        USERNAME = self.username.text()
        PASSWORD = self.password.text()

        self.query = QSqlQuery("SELECT username,password FROM users")
        while (self.query.next()):
            username = self.query.value(0).toString()
            password = self.query.value(1).toString()

        if USERNAME == username and PASSWORD == password:
            print "Login!"
        else:
            print "failed"

        
app = QApplication(sys.argv)
form = Form()
form.show()
app.exec_()

Edit: Original post here: https://forum.qt.io/topic/75347/how-to-create-a-login-form-in-python-how-i-can-check-if-username-and-password-is-present-in-the-database-this-is-my-code

[p3c0]

@Gelo Thank you but it would be better if you post it into the original thread so that everything is connected. I will copy it into the original thread.