Pyspider crawler return has no result

problem description

pyspider is the latest version,

the environmental background of the problems and what methods you have tried

reinstall the version of python3.6 used by the latest spider, on GitHub

related codes

/ / Please paste the code text below (do not replace the code with pictures)

-sharp!/usr/bin/env python
-sharp -*- encoding: utf-8 -*-
-sharp Created on 2018-07-13 15:59:53
-sharp Project: TripAdvisor
from pyspider.libs.base_handler import *
import pymongo
class Handler(BaseHandler):
    
    crawl_config = {
    }
    client=pymongo.MongoClient("localhost")
    db=client["trip"]

    @every(minutes=24 * 60)
    def on_start(self):
        
        self.crawl("https://www.tripadvisor.cn/Attractions-g186338-Activities-c47-t163-London_England.html", callback=self.index_page,validate_cert=False)
      

    @config(age=10 * 24 * 60 * 60)
    def index_page(self, response):
        for each in response.doc("-sharpATTR_ENTRY_ > div.attraction_clarity_cell > div > div > div.listing_info > div.listing_title > a").items():
            self.crawl(each.attr.href, callback=self.detail_page)

    @config(priority=2)
    def detail_page(self, response):
        url=response.url
        name=response.doc(".heading_title").text()
        rating=response.doc("div > .more").text()
        address=response.doc(".location > .address").text()
        phone=response.doc(".phone > div").text()
        duration=response.doc(".hours > .duration").text()
        
        return {
            "name":name,
            "rating":rating,
            "address":address,
            "phone":phone,
            "duration":duration,
            "url": url
            
        }
    def on_result(self,result):
        if result:
            self.save_to_mongo(result)
       
    def save_to_mongo(self,result):
        if self.db["london"].insert(result):
            print("saved to mongo",result)

what result do you expect? What is the error message actually seen?

Mar.28,2021
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b3aeff-2c280.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3aeff-2c280.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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