Scrapy初探，爬取猫眼网排行100的电影

淩亂°似流年 2024-04-17 05:57 79阅读 0赞

**1.创建scrapy项目**

scrapy startproject maoyanspider

**2.写items.py**

# -*- coding: utf-8 -*-
    
    # Define here the models for your scraped items
    #
    # See documentation in:
    # https://docs.scrapy.org/en/latest/topics/items.html
    
    import scrapy
    
    
    class MaoyanspiderItem(scrapy.Item):
        # define the fields for your item here like:
        movie_name = scrapy.Field()
        actor = scrapy.Field()
        time = scrapy.Field()
        score = scrapy.Field()
        img = scrapy.Field()

**3.设置setting.py**  
把setting.py中的DEFAULT\_REQUEST\_HEADERS的注释去除，添加User-Agent

'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.100 Safari/537.36',

再去除ITEM\_PIPELINES的注释  
**4.创建爬虫文件**

scrapy genspider Myspider 'maoyan.com'

创建成功后再文件目录spiders中会出现Myspider.py文件，然后开始写爬虫

# -*- coding: utf-8 -*-
    import scrapy
    from maoyanspider.items import MaoyanspiderItem
    
    class MyspiderSpider(scrapy.Spider):
        name = 'Myspider'
        allowed_domains = ['maoyan.com/']
        baseUrl = 'https://maoyan.com/board/4?offset='
        offset = 0
        start_urls = [baseUrl+str(offset)]
    
    
        def parse(self, response):
            item = MaoyanspiderItem()
    
            info = response.xpath(".//div[@class='board-item-content']")
    
            for each in info:
                movie_name = each.xpath('./div/p/a/text()').extract()
                actor = each.xpath('./div/p[@class = "star"]/text()').extract()
                time = each.xpath('./div/p[@class = "releasetime"]/text()').extract()
                score = each.xpath('./div/p[@class = "score"]/i/text()').extract()
    
    
                item["movie_name"] = movie_name[0]
                item["actor"] = str(actor[0]).strip()
                item["time"] = time[0]
                item["score"] = score[0]+score[1]
    
                yield item
    
            if self.offset < 90:
                self.offset += 10
                url = self.baseUrl + str(self.offset)
                yield scrapy.Request(url,callback=self.parse,dont_filter=True)

**5.写pipelines.py**

# -*- coding: utf-8 -*-
    
    # Define your item pipelines here
    #
    # Don't forget to add your pipeline to the ITEM_PIPELINES setting
    # See: https://docs.scrapy.org/en/latest/topics/item-pipeline.html
    import json
    
    class MaoyanspiderPipeline(object):
    
        def __init__(self):
            self.file = open('Maoyan.json','w',encoding='utf-8')
    
        def process_item(self, item, spider):
            jsontext = json.dumps(dict(item),ensure_ascii=False,indent=1)+','
            self.file.write(jsontext)
            return item
    
        def close_file(self):
            self.file.close()

**6.运行程序,两种方法**  
（1）.在spiders文件下创建一个xx.py文件，内容写

# -*- coding: utf-8 -*-
    #@Time -***-:2019/8/21 18:25-***-
    
    from scrapy import cmdline
    cmdline.execute('scrapy crawl Myspider'.split())

(2).直接在命令行中切换目录到第二个maoyanspider目录，写入

scrapy crawl Myspider

即可运行