How to validate credit card number in Python Tkinter using regex?

 

test1.py

from tkinter import *
from tkinter import messagebox
from test.regex import creditvalidation

app=Tk()
app.geometry("500x400")
app.title("Hancie e-Learning Studio")


def check():
    txt = text.get()
    creditResult=creditvalidation(txt)
    if creditResult==True:
        messagebox.showinfo("Info","The credit number is valid")
    else:
        messagebox.showerror("Error","Invalid credit number")


text=Entry(app,font=("Times New Roman",16))
text.pack()

btn=Button(app,text="Check Credit",font=("Times New Roman",16), command=check)
btn.pack()


app.mainloop()

regex.py

import re

def creditvalidation(credit):
    regex=re.compile("(?:[0-9]{4}-){3}[0-9]{4}|[0-9]{16}")
    if re.fullmatch(regex, credit):
        creditResult=True
    else:
        creditResult=False
    return creditResult

Output