Python Port Scanner Using Socket Bind Function

import socket
import sys
from datetime import datetime


start_time = datetime.now()

print("Start Date & Time=", start_time)
with open("port-scanner-3.txt",'w') as file:
    print("Start Date & Time=", start_time, file=file)

try:
    input_host_name = input("Please Enter host to Scan: ")
    host_ip = socket.gethostbyname(input_host_name)
except socket.gaierror:
    print("HostName Could not be resolved")
    print("\n\nHostName Could not be resolved", file=file)
    sys.exit()


for port in range(1, 1025):
    try:
        # AF_INET means IP4 address. AF_INET6 means IP6 address
        # SOCK_STREAM means we are using TCP. SOCK_DGRAM for UDP
        serv = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        serv.bind((host_ip, port))

    except :
        with open("port-scanner-3.txt", 'a') as file:
            print("Open Port ", port)
            print("\nOpen Port ", port, file=file)


end_time = datetime.now()

print("End  Date & Time=", end_time)
with open("port-scanner-3.txt",'a') as file:
    print("\n\nEnd Date & Time=", end_time, file=file)


print("Time Taken", end_time - start_time)
with open("port-scanner-3.txt",'a') as file:
    print("\n\nTime Taken", end_time - start_time, file=file)