Question

我是Python和网络抓取的新手。请原谅我的无知。在此程序中，我想按计划运行Scrapy Spider。我已经尝试过“时间表”包。但这并不成功，因为do（）方法需要一个方法调用作为参数。我尝试传递类名“ MySpider”，但未产生所需的输出。我也尝试过cron工作。但是无法弄清楚如何将Spider用作Cron工作。请帮助我了解如何按计划运行此程序。任何帮助，将不胜感激。我在Mac OS上使用Python 3.7

import csv
import os
import random
from time import sleep
import scrapy
import schedule
import time

class Myspider(scrapy.Spider):
    name = "spider1"

    with open("data.csv", "a") as filee:

        if os.stat("data.csv").st_size != 0:
            filee.truncate(0)
        filee.close()

    def start_requests(self):
        list = ["https://www.example.com/item1",
                "https://www.example.com/item2",
                "https://www.example.com/item3",
                "https://www.example.com/item4",
                "https://www.example.com/item5"
                ]

        for i in list:
            yield scrapy.Request(i, callback=self.parse)
            sleep(random.randint(0, 5))

    def parse(self, response):
        product_name = response.css('#pd-h1-cartridge::text')[0].extract()
        product_price = response.css(
            '.product-price .is-current, .product-price_total .is-current, .product-price_total ins, .product-price ins').css(
            '::text')[3].extract()


        with open('data.csv', 'a+') as file:
            itemwriter = csv.writer(file, delimiter=',', quotechar='"', quoting=csv.QUOTE_MINIMAL)
            itemwriter.writerow([str(product_name).strip(), str(product_price).strip()])
            file.close()

 schedule.every(120).seconds.do(Myspider)

        while 1:
            schedule.run_pending()
            time.sleep(10)

按计划运行Python Scrapy Spider

0 个答案: