scrapy入门-获取电影排行榜保存到json,csv,mysql
作者：互联网
1.下载包
pip install scrapy
2.在使用路径终端上创建项目指令： scrapy startproject 项目名
scrapy startproject maoyan
cd maoyan
scrapy genspider maoyan https://www.maoyan.com/
创建后目录大致页如下
|-ProjectName #项目文件夹
|-ProjectName #项目目录
|-items.py #定义数据结构
|-middlewares.py #中间件
|-pipelines.py #数据处理
|-settings.py #全局配置
|-spiders
|-__init__.py #爬虫文件
|-maoyan.py
|-scrapy.cfg #项目基本配置文件
3.settings设置如下：
# 项目名
BOT_NAME = 'maoyan'
SPIDER_MODULES = ['maoyan.spiders']
NEWSPIDER_MODULE = 'maoyan.spiders'
# Crawl responsibly by identifying yourself (and your website) on the user-agent
USER_AGENT = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.45 Safari/537.36'
# ROBOTSTXT_OBEY：是否遵循机器人协议，默认是true，需要改为false，否则很多东西爬不了
ROBOTSTXT_OBEY = False
# CONCURRENT_REQUESTS：最大并发数，很好理解，就是同时允许开启多少个爬虫线程
#CONCURRENT_REQUESTS = 32
# 下载延迟时间，单位是秒，控制爬虫爬取的频率
DOWNLOAD_DELAY = 3
# DEFAULT_REQUEST_HEADERS：默认请求头，上面写了一个USER_AGENT，其实这个东西就是放在请求头里面的，这个东西可以根据你爬取的内容做相应设置。
#DEFAULT_REQUEST_HEADERS = {
# 'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
# 'Accept-Language': 'en',
#}
#ITEM_PIPELINES：项目管道，300为优先级，越低越爬取的优先度越高
ITEM_PIPELINES = {
'myfirstPj.pipelines.MyfirstpjPipeline': 300,
}
#编码格式 , 不设置的话json就会乱码
FEED_EXPORT_ENCODING = 'utf-8'
USER_AGENT 在浏览器中可看到：
4.在items.py上编写
import scrapy
class MaoyanItem(scrapy.Item):
move_name=scrapy.Field()
peaple_name=scrapy.Field()
move_time = scrapy.Field()
describe= scrapy.Field()
5.创建一个maoyan_spider.py文件
6.在 maoyan_spider.py上编写
import scrapy
from maoyan.items import MaoyanItem
class MaoyanSpiderSpider(scrapy.Spider):
name = 'maoyan_spider' #项目名
allowed_domains = ['maoyan.com'] #域名
#url入口
start_urls = ['https://www.maoyan.com/board/4?timeStamp=1638539026134&channelId=40011&index=1&signKey=a675982b76014e4a8b7f3beb5afe7441&sVersion=1&webdriver=false']
def parse(self, response):
# //*[@id="app"]/div/div/div[1]/dl/dd[3]/div
move_list = response.xpath("//*[@id='app']/div/div/div[1]/dl//div/div/div[1]")
for d in move_list:
maoyan_item=MaoyanItem()## 初始化item对象保存爬取的信息
# //*[@id="app"]/div/div/div[1]/dl/dd[3]/div/div/div[1]/p[1]/a name
# //*[@id="app"]/div/div/div[1]/dl/dd[3]/div/div/div[1]/p[3] time
# //*[@id="app"]/div/div/div[1]/dl/dd[3]/div/div/div[1]/p[2] peaple
n_list= []
p_list= []
# 电影名
aaa=d.xpath(".//p[1]/a").extract_first().split('"') # 切割第一个数据
for aa in aaa:
n_list.append(aa)
maoyan_item['move_name'] = n_list[3]
# 主演
bbb=d.xpath(".//p[2]").extract_first().split('\n')
for bb in bbb:
p_list.append(bb)
maoyan_item['peaple_name'] = p_list[1].replace('主演：','').strip()
# 上映时间
move_time1 = d.xpath(".//p[3]").extract()
for t in move_time1:
ccc=re.search(r"(\d{4}-\d{1,2}-\d{1,2})",t).group(0)
maoyan_item['move_time'] =ccc
print(maoyan_item)
yield maoyan_item # 提交到调度器
7.手动创建一个main.py,用来运行的，也可以用指令
from scrapy import cmdline
cmdline.execute('scrapy crawl maoyan_spider'.split())
8.运行main.py
9.存储方式：json,csv,mysql
1)保存到json——注意路径
scrapy crawl maoyan_spider -o test.json
2）保存到csv——注意路径
scrapy crawl maoyan_spider -o test.csv
3）保存到数据库mysql
#settings.py # mongo_host='192.168.x.xxx' # mongo_post=27017 # mongo_db_name='maoyan' # mongo_db_collection='maoyan_movie' MYSQL_HOST = 'localhost' MYSQL_DBNAME = 'maoyan_sql' MYSQL_USER = 'root' MYSQL_PASSWD = '1234'
#pipelines.py
# mongo_host='192.168.x.xxx'
# mongo_post=27017
# mongo_db_name='maoyan'
# mongo_db_collection='maoyan_movie'
MYSQL_HOST = 'localhost'
MYSQL_DBNAME = 'maoyan_sql'
MYSQL_USER = 'root'
MYSQL_PASSWD = '1234'#pipelines.py
from itemadapter import ItemAdapter
import pymysql
from sqlalchemy import *
from sqlalchemy.orm import sessionmaker
from sqlalchemy.ext.declarative import declarative_base
from datetime import datetime
#连接数据库
from maoyan import settings
def dbHandle():
conn = pymysql.connect(
host = "localhost",
user = "root",
passwd = "1234",
charset = "utf8mp4",
use_unicode = False
)
return conn
class MaoyanPipeline:
def __init__(self):
# 连接数据库
self.connect = pymysql.connect(
host=settings.MYSQL_HOST,
db=settings.MYSQL_DBNAME,
user=settings.MYSQL_USER,
passwd=settings.MYSQL_PASSWD,
charset='utf8',
use_unicode=True)
# 通过cursor执行增删查改
self.cursor = self.connect.cursor()
def process_item(self, item, spider):
try:
# 插入数据
self.cursor.execute(
"""insert into move(move_name,peaple_name,move_time) value (%s, %s, %s)""",
(item['move_name'],
item['peaple_name'],
item['move_time']))
# 提交sql语句
self.connect.commit()
except BaseException as e:
# 出现错误时打印错误日志
print("error:------------", e, "-----------------")
return item
#dbmongo部分参考
# def __init__(self):
# host=mongo_host
# post=mongo_post
# dbname=mongo_db_name
# sheetname=mongo_db_collection
# client=pymongo.MongoClient(host=host,post=post)
# mydb=client[dbname]
# self.post=mydb[sheetname]#读写操作
# def process_item(self, item, spider):
# data=dict(item)#先转字典，再数据插入
# self.post.insert(data)
# return item
# # class HellospiderPipeline(object):
# def process_item(self, item, spider):
# dbObject = dbHandle()
# cursor = dbObject.cursor()
# cursor.execute("USE maoyan_sql")
# #插入数据库
# sql = "INSERT INTO move(move_name,peaple_name,move_time) VALUES(%s,%s,%s)"
# try:
# cursor.execute(sql,
# ( item['move_name'], item['peaple_name'], item['move_time']))
# cursor.connection.commit()
# except BaseException as e:
# print("错误在这里>>>>>>>>>>>>>", e, "<<<<<<<<<<<<<")
# dbObject.rollback()
# return item
数据库中查看如下：
结尾：#以下仅供参考：
#middlewares.py
#定义ip代理中间件 import base64 class my_proxy(object): def process_request(self,request,spider): request.meta['proxy']='http-xxx.com:端口号' proxy_name_pass=b'用户名：密码' encode_pass_name=base64.b64encode(proxy_name_pass)#加密 request.headers['proxy-Authorization']='Basic '+encode_pass_name.decode()
#中间件定义之后一定要在settings文件内启用
#settings.py DOWNLOADER_MIDDLEWARES = { # 'maoyan.middlewares.MaoyanDownloaderMiddleware': 543, 'maoyan.middlewares.my_proxy': 543 }
#middlewares.py #定义useragent中间件 class my_useragent(object): def process_request(self,request,spider): USER_AGENT_LIST=[百度一下就有] agent=random.choice(USER_AGENT_LIST) request.headers['User_Agent']=agent #settings.py优先级不能相同 DOWNLOADER_MIDDLEWARES = { 'maoyan.middlewares.my_proxy': 543, 'maoyan.middlewares.my_uesragent': 544, }
标签：py,name,maoyan,move,scrapy,item,json,mysql,div 来源： https://www.cnblogs.com/97hong/p/15659448.html