Example interaction with commandr.

commandr_example.txt

  $ python example.py
  > Command must be specified
  >
  > General Commands:
  >   greet

  $ python example.py greet
  > All options without default values must be specified
  >
  > Current Options:
  >  --name=None
  >  --title=Mr.
  >  --times=1
  >
  > Documentation for command 'greet':
  > ----------------------------------------
  > Greet someone.
  >   Arguments:
  >     name - Name to greet.
  >     title - Title of the person to greet.
  >     times - Number of times to say the greeting.
  > ----------------------------------------
  >
  > Usage: example.py command [options]
  > Options without default values MUST be specified
  >
  > Options:
  >   -h, --help
  >   -n NAME, --name=NAME
  >   -t TITLE, --title=TITLE
  >                           [default: "Mr."]
  >   --times=TIMES           [default: 1]

  $ python example.py greet --name Smith
  > Hi Mr. Smith!

  $ python example.py greet John --times blah
  > Usage: example.py command [options]
  > Options without default values MUST be specified
  >
  > example.py: error: option --times: invalid integer value: 'blah'
  
  $ python example.py greet Nick Dr. --times 2
  > Hi Dr. Nick!
  > Hi Dr. Nick!