Scan IP's for Mikrotik

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import requests
import socket
import sys
start_ip = str(sys.argv[1])
end_ip = str(sys.argv[2])
log_file = open('Mikrotik_Finder.log','a+')
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.settimeout(0.1)

print("Scan Started")
log_file.write("Scan Started\n")

def undotIPv4 (dotted):
    return sum (int (octet) << ( (3 - i) << 3) for i, octet in enumerate (dotted.split ('.') ) )

def dotIPv4 (addr):
    return '.'.join (str (addr >> off & 0xff) for off in (24, 16, 8, 0) )

def rangeIPv4 (start, stop):
    for addr in range (undotIPv4 (start), undotIPv4 (stop) ):
        yield dotIPv4 (addr)

ip_set = rangeIPv4(start_ip, end_ip)

for ip in ip_set:
    try:
        url = "http://"+ip
        r = requests.get(url, timeout=0.1)
        site = r.text
        if site.find("mikrotik") >= 0 :
                print("\n>>> Found Mikrotik <<<\n")
                print(url)
                log_file.write("\n>>> Found Mikrotik <<<\n")
                log_file.write(url)
                ssh_result = sock.connect_ex((ip,22))
                if ssh_result == 0:
                        print("SSH Port is open")
                        log_file.write("\nSSH Port is open\n")
                else:
                        print("\nSSH Port is not open\n")
        else:
                pass

        log_file.flush()

    except:
        pass

    if (str(ip).endswith(".0")) : print("Range for this Round:", ip, "/24")

log_file.flush()
log_file.close()

# Usage : name_of_script.py 10.0.0.0 10.0.0.10