import os
from netmiko import ConnectHandler
import sys
import time
import getpass

#config goes in device_commands - conf t happens by default - put in each line whatever config needs applying - I've put in a basic example for ntp

#list all devices you'd like the config applying to in hosts.txt in the same folder as this python file.

platform = 'cisco_ios'
username = raw_input("Username? :")
password = getpass.getpass(prompt="Password?: ")
port = 22
data = open("hosts.txt")
for line in data:
    try:
        device = ConnectHandler(device_type=platform, ip=line.strip(), username=username, password=password, port=port, secret=password)
        device.enable()
        device_commands = [ 'ntp server 1.1.1.1',
                            'ntp server 2.2.2.2',
			    'end',
			    'wr mem']
        output = device.send_config_set(device_commands)
        print line
        print output
        f = open("configoutput.txt", 'a')
        f.write(str(line + output + "\n"))
    except:
            continue # Basically, ignore the error