Lantronix EMG 8500 EMG User Guide - Page 278

Python Custom Script - EMG CLI Session 12: Scripts An example of a Python Custom Script that uses the Pexpect module to interact with the CLI session and the device ports to detect the prompt on any devices connected to the EMG, and set the device port name to be the same as the device prompt: #! python # Script to detect the prompt on a device connected to an EMG device port, # and set the device port name to the prompt. Punctuation characters are # removed and the device port number is appended to the name. Prompts ending # in '>' are detected. For example, for a Cisco device attached to device # port 3 and displays this prompt: # engcisco_cat3560> # the name for device port 3 will be set to "engcisco_cat3560-3" import pexpect import datetime import time import sys import re now = datetime.datetime.now() print("Detecting devices on EMG at ", end="") print(now.strftime("%Y-%m-%d %H:%M")) # start the CLI session to get number of device ports p=pexpect.spawn('clisession -U sysadmin') emgPrompt = "" numPorts = 0 loggedIn = False while not loggedIn: i = p.expect([pexpect.TIMEOUT, pexpect.EOF, 'Model Number: SLC80(\d*)\r\n', 'Model Number: SLB882\r\n timeout=10) if i == 0: # Timeout print("Timeout waiting to login.") p.terminate(True) sys.exit(1) elif i == 1: # EOF print("Session unexpectedly terminated.") p.terminate(True) sys.exit(1) elif i == 2: # SLC8000 model number model = p.match.group(1) numPorts = int(model) elif i == 3: # SLB882 model number numPorts = 8 elif i == 4: # prompt EMG™ Edge Management Gateway User Guide 278