code: def __space_delimited_list(value):
      '''validate that a value contains one or more space-delimited values'''
      if isinstance(value, six.string_types):
          value = value.strip().split()
  
      if hasattr(value, '__iter__') and value != []:
          return (True, value, 'space-delimited string')
      else:
          return (False, value, '{0} is not a valid space-delimited value.\n'.format(value)f __space_delimited_list(value):
      '''validate that a value contains one or more space-delimited values'''
      if isinstance(value, six.string_types):
          value = value.strip().split()
  
      if hasattr(value, '__iter__') and value != []:
          return (True, value, 'space-delimited string')
      else:
          return (False, value, '{0} is not a valid space-delimited value.\n'.format(value))
docs: validate that a value contains one or more space-delimited values