#!/usr/bin/python

import nmap, time

start_time = time.time()

def scan_subnet_for_ssh_cisco(subnet):
### Function scanning subnet with nmap (ports tcp/22, tcp/23) and finding cisco ios devices
### returning dictionary with ip address and connection method (telnet, ssh)

    ip_dict = {}
    nm = nmap.PortScanner()
    nm.scan(subnet, '22-23')
    for host in nm.all_hosts():
      if nm[host]['tcp'][22]['cpe'] == "cpe:/o:cisco:ios":    # check if device is cisco:ios and has ssh enabled
          ip_dict[host] = "ssh"
      else:
          if  nm[host]['tcp'][23]['cpe'] == "cpe:/o:cisco:ios":   #check if device is cisco:ios and has telnet enabled
               ip_dict[host] = "telnet"
    return ip_dict

z = {}
subnet = '192.168.10.0/24'   ### subnet - change it for your requirements

dict = scan_subnet_for_ssh_cisco(subnet)

print dict

print("--- Total runtime %s seconds ---" % round((time.time() - start_time),2))