How to set a field example value when using python Flask-Restful+apispec+marshmallow?

Question

I'm using flask to create an web application. I want to generate an API reference doc with swagger. libraries: Flask-Restful, apispec, marshmallow (maybe also webargs)

I am able to generate a swagger page with most of my requirements, but I don't know how to set an example for a field. Have read official docs of these libraries, but didn't find where to set an example value of field.

Expected result: Expected result 1

Expected result 2

my result: (no example value) my result

my code:

# request_schema.py
from marshmallow import Schema, fields

class RequestSchema(Schema):
    name = fields.Str(required=True)      # want to set an example value here

# app.py
from flask_apispec import use_kwargs
from flask_apispec.views import MethodResource

from request_schema import RequestSchema
from flask_restful import Resource

class Restful_Request(MethodResource, Resource):
    @use_kwargs(RequestSchema(many=True), location='json')
    def post(self, *args, **kwargs):
        pass

Answer 1

Pass it in field metadata.

class RequestSchema(Schema):
    name = fields.Str(required=True, metadata={"example": "Whatever"})