python 爬取数据还要下载scrapy吗

python 爬取数据还要下载scrapy吗

(一)爬取环境

win10

python3

scrapy

(二)豆瓣电影参考标准

主要参考来自神箭手的云市场

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(三)爬取步骤

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主要爬取的字段有：标题，得分，封面url，简介，全部评论

采用scrapy、ip代理池、ua次进行内容爬取

# -*- coding: utf-8 -*-

# @Time : 2018/7/22 14:45

# @Author : 蛇崽

# @Email : 643435675@QQ

# @File : doubanmoviespider.py(豆瓣电影)

import json

import scrapy

from bs4 import BeautifulSoup

class DouBanSpider(scrapy.Spider):

name = 'adouban_spider'

start_urls = ['/']

allowed_domains = ['movie.douban']

def parse(self,response):

for count in range(0,27002,20):

fir_url = '=T&range=0,10&tags=&start={}'.format(count)

yield scrapy.Request(

fir_url,

callback=self.parse_main

)

def parse_main(self,response):

infos = json.loads(response.body.decode('utf-8'))

'名称 封面图片 简介 评分 短评top100'

print(infos)

datas = infos['data']

for data in datas:

title = data['title'] # 名称

cover = data['cover'] # 封面图片

rate = data['rate'] # 评分

url = data['url'] # 详情url

id = str(data['id'])

if url:

print(title,cover,rate,url)

yield scrapy.Request(url,callback=self.parse_detail,meta={'id':id})

def parse_detail(self,response):

strid = a['id']

base_url = '/{}/comments?'.format(strid)

# 全部评论的链接

b_url = '/{}/comments?status=P'.format(strid)

# 前一百条评论

n_url = '=0&limit=20&sort=new_score&status=P'

for page in range(0,100,20):

n_url = base_url+'start={}&limit=20&sort=new_score&status=P'.format(page)

print('n_url################# ',n_url)

if n_url:

yield scrapy.Request(b_url,callback=self.parse_comment)

soup = BeautifulSoup(response.body, 'lxml')

# 简介(先隐藏后不隐藏的)

try:

abstract = soup.find('span', class_='all hidden').get_text()

except:

abstract = soup.find('span',attrs={'property':'v:summary'}).get_text()

pass

# print('abstract -------- ',abstract)

def parse_comment(self,response):

soup = BeautifulSoup(response.body,'lxml')

shorts = soup.find_all('span',class_='short')

for short in shorts:

print('short ============= ',_text())

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