Port scanning in Python

index.py

import socket

def port_scanner(host, ports):
    hostname = socket.gethostbyname(host)
    print(f'Scanning {host}: {hostname}')
    
    for port in ports:
        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        socket.setdefaulttimeout(1)
        result = sock.connect_ex((hostname, port))
        
        if result == 0:
            print(f'Port {port} is open')
        else:
            print(f'Port {port} is closed')
            
        sock.close()
    

host = '127.0.0.1'
ports = [22, 80. 443, 3000]
port_scanner(host, ports)