import socket

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind(("127.0.0.1", 1200))
s.listen(600)

print("Waiting for connections...")
while 1:
    clientsocket, address = s.accept()
    print(f"Connection from {address} has been established!")
    clientsocket.send(bytes("Welcome to the server!","utf-8"))

import socket

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

for port in range(1000,1400):
    try:
        s.settimeout(3)
        connection = s.connect(("127.0.0.1",port))
        print(f"Port {port} is open!")
    except:
        print(f"Port {port} is closed.")

s.close()

for port in range(1000, 1400):
    try:
        with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
            s.settimeout(3)
            connection = s.connect(("127.0.0.1", port))
            print(f"Port {port} is open!")
    except:
        print(f"Port {port} is closed.")