program to check if imei number valid or not

# program to check if imei number valid or not - open source totaly free
from PyQt6.QtWidgets import QApplication, QMainWindow, QLabel, QLineEdit, QVBoxLayout, QWidget

import sys


class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()

        self.setWindowTitle("My App")

        self.label = QLabel()

        self.input = QLineEdit()

        self.input.textChanged.connect(self.func)

        layout = QVBoxLayout()
        layout.addWidget(self.input)
        layout.addWidget(self.label)

        container = QWidget()
        container.setLayout(layout)

        # Set the central widget of the Window.
        self.setCentralWidget(container)


# Driver code
    def func(self, n):
        def sumDig( n ):
           a = 0
           while n > 0:
                a = a + n % 10
                n = int(n / 10)

           return a

# Returns True if n is valid EMEI
        def isValidEMEI(n):

# Converting the number into
    # String for finding length
           s = str(n)
           l = len(s)

    # If leng+th is not 15 then IMEI is Invalid
           if l != 15:
                return False

           d = 0
           sum = 0
           for i in range(15, 0, -1):
                   d = (int)(int(n) % 10)
                   if i % 2 == 0:

            # Doubling every alternate digit
                        d = 2 * d

        # Finding sum of the digits
                   sum = sum + sumDig(d)
                   n = int(n) / 10
           return (sum % 10 == 0)

        if isValidEMEI(n):
           self.label.setText("\nValid IMEI Code\n")

        else:
           self.label.setText("WRONG or Invalid IMEI")



app = QApplication(sys.argv)

window = MainWindow()
window.show()

app.exec()