creating a home

how to create a home that will raise when an invalid option or nothing is entered

 import cliflect
 console=cliflect.console()
 @console.home
 def error(erropt):
         if erropt:
                 console.echo(f'{erropt} is an invalid option', color='red')
                 console.echo('''usage hello.py [option] arg...
options:
-h : help''')
         else:
                 console.echo('no option entered', color='red')
                 console.echo('use -h for help')
 @console.cmd('-h')
 def help_(arg):
         console.echo('you entered help option')
 console.run()

at console

$ python hello.py
no option entered
use -h for help

$ python hello.py test
test is an invalid option
usage hello.py [option] arg...
options:
        -h -- help

$ python hello.py -h
you entered help option