code: def get_markup_choices():
      
      available_reader_list = []
      module_dir = os.path.realpath(os.path.dirname(__file__))
      module_names = filter(
          lambda x: x.endswith('_reader.py'), os.listdir(module_dir))
  
      for module_name in module_names:
          markup = module_name.split('_')[0]
          reader = get_reader(markup=markup)
  
          if reader.enabled is True:
              available_reader_list.append((markup, reader.name))
  
      return available_reader_list
docs: Receives available markup options as list.