from web_poet import ItemPage, field, RequestUrl, HttpClient, cached_method

class MyPage(web_poet.ItemPage):
    request_url: RequestUrl
    http: HttpClient
        
    @cached_method
    async def response(self):
        # create API url from the request url
        api_url = ...
        response = await self.http.get(api_url)
        return response.json()
    
    @field
    async def price(self):
        resp = await self.response()
        return resp["data"]["price"]