爬一爬豆瓣电影

# coding=utf-8

import urllib.request
import requests
from lxml import etree
import time

#获取主题连接下的全部地址

'''
获取每个主题下有多少页内容  (没有输入，输出字典)
'''
class theme_page(object):
    def __init__(self):
        self.tags = [u"爱情", u"喜剧", u"动画", u'剧情', u'科幻', u'动作', u'经典', u'悬疑', u'青春', u'犯罪', u'惊悚', \
                u"文艺", u"搞笑", u"纪录片", u'励志', u'恐怖', u'战争', u'短片', u'黑色幽默', u'魔幻', u'传记', \
                u'情色', u"感人", u"暴力", u'动画短片', u'家庭', u'音乐', u'童年', u'浪漫', u'黑帮', u'女性', \
                u'同志', u"史诗", u"童话", u'烂片', u'cult']

    def get_total_num(self):
        tags = self.tags
        total_num = []
        list = []
        for tag in tags:
            # print(tag)   #主题名称
            re_url = 'https://movie.douban.com/tag/{}?start=0&type=T'.format(urllib.request.quote(tag))
            # print(re_url)     # 主题链接
            s = requests.get(re_url)
            contents = s.content.decode('utf-8')
            selector = etree.HTML(contents)
            num = selector.xpath('//*[@id="content"]/div/div[1]/div[3]/a[10]/text()')
            total_num.append(int(num[0]))
            # print(num[0])    # 总页数
            list.append({                # list :{'爱情': '393'}, {'喜剧': '392'}, {'动画': '274'},
                '主题' : tag ,
                '总页数' : num[0]
            })
        return list 

#使用lxml工具先抓到列表页中的电影简介信息和链接

tag = urllib.request.quote(u'爱情')
url_1 = 'https://movie.douban.com/tag/{}?start=0&type=T'.format(tag)

class douban(object):
    def __init__(self,*args,**kwargs):
        self.conn = pymysql.connect(host='localhost', port=3306, user='root', password='', db='douban', charset='utf8')
        self.cursor = self.conn.cursor()
        self.sql_info = "INSERT IGNORE INTO `douban_mov` VALUES(%s,%s,%s,%s,%s,%s)"

    def search(self,content):
        '''
        爬取页面内电影信息
        '''
        try:
            selector = etree.HTML(content)
            textslist = selector.xpath('//div[contains(@class,"grid-16-8 clearfix")]/div[1]/div[2]/table')
        except Exception as e:
            print(e)

        try:
            for text in textslist:
                lists = []
                title = text.xpath('tr/td[2]/div/a/text()')     
                score = text.xpath('tr/td[2]/div/div/span[2]/text()')      
                num = text.xpath('tr/td[2]/div/div/span[3]/text()')       
                link = text.xpath('tr/td/a/@href')           
                content = text.xpath('tr/td[2]/div/p/text()')      

                if title:
                    title = title[0].strip().replace('\n', "").replace(' ', "").replace('/', "") if title else ''
                    score = score[0] if score else ''
                    num = num[0].replace('(', "").replace(')', "") if num else ''
                    link = link[0] if link else ''
                    time = content[0].split(' / ')[0] if content else ''
                    actors = content[0].split(' / ')[1:6] if content else ''
                    lists.append({
                        '电影名' : title,
                        '评分' : score,
                        '评价人数' : num,
                        '详情链接' : link,
                        '上映时间' : time,
                        '主演' : actors
                    })
                    if lists:
                        lists = lists.pop()
                    else:
                        lists = u' '

                    print(lists)
                    try:
                        self.cursor.execute(self.sql_info,(str(lists['电影名']),str(lists['评分']),str(lists['评价人数']),str(lists['详情链接']),
                                          str(lists['上映时间']),str(lists['主演'])))
                        self.conn.commit()
                    except Exception as e:
                        print(e)
        except Exception as e:
            pass        

#从列表页中找到每部电影链接，进去抓详情
        
def get_detail(self,url):
        '''
        抓取每页详细信息
        '''
        try:
            detail_contents = requests.get(url)
            detail_contents =detail_contents.content.decode('utf-8')
            selector = etree.HTML(detail_contents)
        except Exception as e:
            print(e)
        detail = []
        try:
            detail_director = selector.xpath('//*[@id="info"]/span[1]/span[2]/a/text()')   # 导演
            detail_time = selector.xpath('//span[contains(@property,"v:runtime")]/text()')   # 片长
            detail_type_1 = selector.xpath('//*[@id="info"]/span[5]/text()')   # 类型
            detail_type_2 = selector.xpath('//*[@id="info"]/span[6]/text()')
            detail_type_3 = selector.xpath('//*[@id="info"]/span[7]/text()')
        except Exception as e:
            print(e)
        if detail_director:
            detail_director = detail_director[0] if detail_director else ''
            detail_time = detail_time[0] if detail_time else ''
            detail_type_1 = detail_type_1[0] if detail_type_1 else ''
            detail_type_2 = detail_type_2[0] if detail_type_2 else ''
            detail_type_3 = detail_type_3[0] if detail_type_3 else ''
            type = detail_type_1 + u' ' + detail_type_2 + u' ' + detail_type_3
            detail.append({
                '导演' : detail_director,
                '片长' : detail_time,
                '类型' : type,
            })
        else:
            pass
        return detail
        
#run

for page_info in page_infos:   # 遍历所有主题
    tags = page_info['主题']
    page = page_info['总页数']
    tag = urllib.request.quote(tags)
    threads = []
    for i in range(int(page)):    # 每个主题下的所有页数
        if i == 0:
            url = 'https://movie.douban.com/tag/{0}?start={1}&type=T'.format(tag, 0)
        else:
            url = 'https://movie.douban.com/tag/{0}?start={1}&type=T'.format(tag, i * 20)
        s = requests.get(url)
        s = s.content.decode('utf-8')
        # pool.apply_async(run.search(s))
        # pool.close()
        # pool.join()
        lists = run.search(s)
        time.sleep(5)