code: def get_commands():
      
      commands = {}
  
      #Try to load the settings file (settings can be specified on the command line) and get the INSTALLED_APPS
      try:
          from percept.conf.base import settings
          apps = settings.INSTALLED_APPS
      except KeyError:
          apps = []
  
      #For each app, try to find the command module (command folder in the app)
      #Then, try to load all commands in the directory
      for app_name in apps:
          try:
              path = find_commands_module(app_name)
              commands.update(dict([(name, app_name) for name in find_all_commands(path)]))
          except ImportError as e:
              pass
  
      return commands
docs: Get all valid commands
      return - all valid commands in dictionary form