Monitor an interface on an Arista Networks EOS powered switch (via Python and eAPI) and uses Growl to provide its status

gistfile1.txt

#!/usr/bin/python
#
# Written by: Mark Berly


import argparse
from jsonrpclib import Server
from gntp.notifier import mini

intf2Monitor = "Ethernet 48"

# connect to the switch either via http or https
def connect( sIpOrHostname, username, password, secure=True ):
   return Server( "%s://%s:%s@%s/command-api" 
                  % ( "http" if not secure else "https", password, username, sIpOrHostname ) )    
   
# collect MAC address table
def getintfInfo( switch, enablePass ):
   rc = switch.runCmds( 1, [ { "cmd": "enable", "input": enablePass },
                             "configure",
                             "show interfaces %s" % intf2Monitor ] )
   return rc[2]

def main():
   # Create the command line parser / arguments
   parser = argparse.ArgumentParser(description='Get MAC table information')
   parser.add_argument( 'sIpOrHostname', help='Switch IP address or Hostname' )
   parser.add_argument( 'username', help='Username' )
   parser.add_argument( 'password', help='Password' )
   parser.add_argument( "--http", help="Use unsecure http connection (default is https)",
                       action="store_false", default=True )      
   parser.add_argument( "--enable-password", help="Enable-mode password",
                        default="" )                                   
   args = parser.parse_args()
   
   # connect to switch
   switch = connect ( args.sIpOrHostname, args.username, args.password, args.http )
   
   # Collect the mac address table
   intfInfo = getintfInfo ( switch, args.enable_password )
   intfDetails = intfInfo['interfaces']['Ethernet48']
   linkChange = intfDetails['interfaceCounters']['linkStatusChanges']
   intfStatus = intfDetails['interfaceStatus']
   intfDesc = intfDetails['description']
   update = 'Interface %s \nis: %s \nlink flaps: %s\nConnected to: %s' % ( intf2Monitor, intfStatus, linkChange, intfDesc )
   mini(update)
   
if __name__ == '__main__':
   main()