main.py

# DNS VERIFIER

import json
import sys
from collections import OrderedDict

import dns.resolver


def checker(dns_val=None) -> OrderedDict:

    ip_values = None
    avail = False

    if dns_val is None:
        raise ValueError("Sorry DNS not found, DNS is needed")
    if isinstance(dns_val, str) is False:
        raise TypeError("Sorry, \'DNS\' must be type \'str\'")
    try:
        output = dns.resolver.resolve(dns_val, 'A')
        ip_values = [ipval.to_text() for ipval in output]
    except dns.resolver.NXDOMAIN:
        avail = True

    return OrderedDict([
        ("DNS", dns_val),
        ("IP", ip_values),
        ("AVAIL", avail),
    ])


if __name__ == '__main__':
    dns_val = None
    option = None
    print("Enter the DNS:")
    dns_val=input()  
    try:
        response = checker(dns_val=dns_val)
    except Exception as err:
        print(f"error: {err}")
        sys.exit(1)

    print(json.dumps(response, indent=4))
    sys.exit(0)