Email validator

#!/usr/local/bin/python3.7
# -*- coding: utf-8 -*import

text = input()

while True:
    command = input()
    if command == 'Complete':
        break
    res = ''
    if command == 'GetUsername':
        if '@' in text:
            res = text[:text.index('@')]
        else:
            res = f"The email {text} doesn't contain the @ symbol."
    elif command == 'Encrypt':
        res = ' '.join([str(ord(x)) for x in text])
    else:
        args = command.split()
        cmd = args[0]
        if cmd == 'Make' and len(args) > 1:
            if args[1] == 'Upper':
                text = text.upper()
                res = text
            elif args[1] == 'Lower':
                text = text.lower()
                res = text
        elif cmd == 'GetDomain' and len(args) > 1:
            count = int(args[1])
            res = text[-count:]
        elif cmd == 'Replace':
            letter = args[1]
            if letter in text:
                res = text.replace(letter, '-')
    if res:
        print(res)