Хорошо ... Я понял это сам: вы можете манипулировать способом визуализации данных, переписав функцию _get_list_value ().см. код ниже
def _get_list_value(self, context, model, name, column_formatters,
column_type_formatters):
"""
Returns the value to be displayed.
:param context:
:py:class:`jinja2.runtime.Context` if available
:param model:
Model instance
:param name:
Field name
:param column_formatters:
column_formatters to be used.
:param column_type_formatters:
column_type_formatters to be used.
"""
column_fmt = column_formatters.get(name)
if column_fmt is not None:
value = column_fmt(self, context, model, name)
else:
value = self._get_field_value(model, name)
choices_map = self._column_choices_map.get(name, {})
if choices_map:
return choices_map.get(value) or value
type_fmt = None
for typeobj, formatter in column_type_formatters.items():
if isinstance(value, typeobj):
type_fmt = formatter
break
if type_fmt is not None:
value = type_fmt(self, value)
### overwritten here
if name == 'items':
html_string = '<ul>'
for item in value.split(','):
html_string += '<li> {} </li>'.format(item)
html_string += '</ul>'
value = Markup(html_string)
return value