NetmikoMultipleDevices

from netmiko import ConnectHandler
from netmiko.ssh_exception import NetMikoTimeoutException
from paramiko.ssh_exception import SSHException
from netmiko.ssh_exception import AuthenticationException

#read text file with comands to run
def commands():
    with open('commands') as f:
        commands_to_send = f.read().splitlines()
    return commands_to_send

#read text file with list of devices to iterate through
def devices():
    with open('devices') as f:
        devices_list = f.read().splitlines()
    return devices_list

#user input for username and password (for security use getpass)
def user_pass():
    username = input("username: ")
    password = input("password: ")
    return username, password

#Main loop to call devices 
def main():
    u, p = user_pass()
    for device in devices():
        print('Connecting to device' + device)
        ip_address_of_device = device
        ios_device = {
            'device_type': 'cisco_ios',
            'ip': ip_address_of_device,
            'username': u,
            'password': p
        }
        #netmiko ConnectHandler and connection error handling 
        try:
            net_connect = ConnectHandler(**ios_device)
        except AuthenticationException:
            print('Authentication failure: ' + ip_address_of_device)
            continue
        except NetMikoTimeoutException:
            print('Timeout to device: ' + ip_address_of_device)
            continue
        except EOFError:
            print('End of file while attempting device ' + ip_address_of_device)
            continue
        except SSHException:
            print('SSH Issue. Are you sure SSH is enabled? ' + ip_address_of_device)
            continue
        except Exception as unknown_error:
            print('Some other error: ' + str(unknown_error))
            continue
        output = net_connect.send_config_set(commands())
        print(output)


if __name__ == "__main__":
    main()