pyats-connections

import os from pyats.topology import loader # Create a dummy testbed.yaml file for demonstration with open('testbed.yaml', 'w') as f: f.write(""" devices: CSR1: type: router os: iosxe credentials: default: username: '%ENV{PYATS_USER}' password: '%ENV{PYATS_PASSWORD}' connections: cli: protocol: ssh ip: 127.0.0.1 # Use a dummy IP for local execution port: 22 """) # Set dummy environment variables for quickstart (replace with actual or secure method) os.environ['PYATS_USER'] = os.environ.get('PYATS_USER', 'devnetuser') os.environ['PYATS_PASSWORD'] = os.environ.get('PYATS_PASSWORD', 'Cisco123!') try: # Load the testbed from the YAML file testbed = loader.load('testbed.yaml') # Get a specific device from the testbed device = testbed.devices['CSR1'] # Connect to the device (connection will fail with dummy IP, but demonstrates API) print(f"Attempting to connect to {device.name} at {device.connections['cli'].ip}...") device.connect(init_exec_params={'timeout': 5}) print(f"Successfully connected to {device.name}.") # Execute a command (will only reach here if connect succeeds) output = device.execute('show version') print("Show Version output:\n", output) except Exception as e: print(f"An error occurred: {e}") print("Note: Connection to 127.0.0.1 will likely fail unless a mock device is running or IP is changed.") finally: # Clean up the dummy testbed file os.remove('testbed.yaml')