Creating Command-Line Interfaces with Click and Python (Network Infra)

Creating command-line interfaces (CLI) using Python and the Click library is an effective way for network guys to automate tasks, configure devices, or manage networks directly from the terminal. Click is a Python package that helps you create simple, user-friendly CLI applications with minimal code.

With Click, we can define commands, options, and arguments, allowing users to interact with the network automation script easily. For instance, we can create a script that automates the configuration of network devices, runs diagnostic tests, or deploys updates across devices in a network.

Commands: Define what the program will do, like connecting to a device or displaying network status.

Options: Provide additional parameters for commands, like IP addresses or credentials.

Arguments: Define required input from the user, such as the name of a configuration file.

       Python Script example :      

# Define the main command

@click.command()
@click.option('--device', prompt='Enter Device  IP', help='The IP address of the network device.')
@click.option('--user', prompt='Enter Username', help='The username to log into the device.')
@click.option('--password', prompt=True, hide_input=True, help='The password for the device.')
def check_status(device, user, password):
    """
    This command checks the status of a network device.
    """
    click.echo(f"Checking status for device {device} with user {user}...")
if __name__ == '__main__':
    check_status()

 

        Execution  of code:

         # python check_device.py --device xx.xx.xx.xx --user admin --password mypassword

       

       Expected Outcome:    

       

       Checking status for device xx.xx.xx.xx with user admin...
        Device xx.xx.xx.xx is up and running!