Errbot recipes: Arguments parsing.

asciiart.py

from errbot import BotPlugin, botcmd
from pyfiglet import Figlet, FigletFont

class AsciiArt(BotPlugin):
  """ Ascii Art related commands. """
  @botcmd(split_args_with=' ')
  def big(self, mess, args):
    """ Generates a big version of what you want to say."""
    fonts = FigletFont.getFonts()
    if len(args) <= 1 or args[0] not in fonts:
      return ('Syntax: `!big font message` with *font* in:\n`' + ', '.join(fonts) + '`')
    font = args[0]
    message = ' '.join(args[1:])
    return '```\n' + Figlet(font=font).renderText(message) + '\n```'