python3实现豆瓣top250电影信息爬取

#python3

#网页基本电影信息提取，即不包括动态内容（评论内容等）

#未写入文件，可自行添加

#使用bs4，而不是正则

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1. ##https://movie.douban.com/top250?start=0&filter=
   ##https://movie.douban.com/top250?start=25&filter=
   ##https://movie.douban.com/top250?start=50&filter=
   ##https://movie.douban.com/top250?start=225&filter=
   import time
   import requests
   from bs4 import BeautifulSoup
   ##import re
   class spider_douban():
       def __init__(self):
           self.href = []#电影链接
           self.movie_name = []#电影名：list中英other
           self.derector_act = []#电影导演和主演等
           self.review = []#简评
           self.comment = []#评分和评价数
           self.errors = []
       def getHtml(self,page):
           url = 'https://movie.douban.com/top250?start=%s&filter=' %page
           print("url:  "+url)
           req = requests.get(url)
       ##    req.encoding = "UTF-8"
           return req.text
   
       #bs4
       def parseHtml_bs4(self,text):
   
           soup = BeautifulSoup(text,"lxml")#解析器lxml或者html.parser
           content = soup.select("#wrapper #content")#返回列表，列表内的内容才能select
           title = content[0].select("h1")[0].text#list没有text，所以得[0]先取出
       ##    print(title)
           content2 = content[0].select(".article .grid_view")
   ##        print(len(content2))
           for li in content2[0].select("li"):
               try:
                   #li>item下主要两个标签pic和info
           ##        pic_href = li.select(".item .pic")#该电影链接和图片，info中也有电影链接
           ##        href = pic_href[0].select("a")[0]["href"]
                   #info下主要两个标签hd>a和bd
                   hd = li.select(".item .info .hd a")#包括电影链接、中英文名、简评
                   self.href.append( hd[0]["href"])#电影链接
                   movie_namec_e = hd[0].select(".title")#返回列表[中文名，英文名]
           ##        for i in movie_namec_e:
           ##            print(i)
           ##        break
                   zh_name = movie_namec_e[0].text
                   try:#可能不存在英文名
                       en_name = movie_namec_e[1].text
                   except:
                       en_name = None
           ##        print(en_name)
           ##        break
                   try:
                       oth_name = hd[0].select(".other")[0].text
                   except:
                       oth_name = None
                   self.movie_name.append([zh_name,en_name,oth_name])
           ##        for i in L:
           ##            print (i)
                   bd = li.select(".item .info .bd")#包括导演、主演、发行时间国家、电影类型；评星评分和评价数；简评
           ##        print(bd)
                   movie_infor = bd[0].select("p")
                   self.derector_act.append(movie_infor[0].text)
                   self.review.append(movie_infor[1].text)#简评
           ##        print(derector_act,comment)
                   L2 = []
                   for span in bd[0].select(".star"):
           ##            print(span.text)
                       if span.text :
                           L2.append(span.text.strip("\n"))#评分和评价数
                   self.comment.append(L2)
           ##        print(L2)
       ##           break
               except Exception as e:
                   self.errors.append(e)
                   
       def save(self):
           if self.errors:#保存error信息
               print("(self.errors)It's bad,there is something wrong waiting for handling!!")
           else:
               print(None,"good")
   ##        for href,movie_name,derector_act,review,comment in\
   ##            zip(self.href,self.movie_name,self.derector_act, self.review, self.comment):
   ##            print(href,movie_name,derector_act,review,comment)
   ##            print("----------------")
       def page_to_page(self,start,end):
           i = 0
           while i <=9:
               getHtml(25*i)
   def start():
       startt = time.clock()
       errors = []#存放网页打不开等错误
       i = 0
       demo = spider_douban()
       while i<=9:
           try:
               text = demo.getHtml(25*i)
           except Exception as e:
               text = False
               errors.append(e)
           finally:
               if text:
                   demo.parseHtml_bs4(text)
               i +=1
       demo.save()
       if errors:
           print("It's bad,there is something wrong waiting for handling!!")
       else:
           print(None,"perfect!!")
       endt = time.clock()
       print("run over!!cost total_time:%s"%(endt - startt))
           
               
   if __name__ =="__main__":
       start()