2. 把这些数据做一个分类。
3 .表设计。现在有点蛋疼的是主键。用自增主键还是电影id做主键。经过我的多方面考虑，我慎重（草率）地决定，用电影id（反正都要建唯一索引，为什么不拿来当主键呢。。）， 所以我刚才又在id那转了一下数据
m_id = re.search("[0-9]+", movie_url).group()
movie["id"] = int(m_id)
4. 建表。。也是蛋疼，我居然纠结过是用mysql还是mongodb， 马上就删自己一个耳光，你会mongodb嘛？感觉要是继续又开一个mongodb的坑，我就再也回不来这个爬虫了。
我也不傻不拉几地自己写建表sql了.直接用的SQLyog。稍微纠结了一下InnoDB和MyISAM。 我开始是想每次把一个电影的信息分别插入三个表，要不要用事务， 又想垃圾数据也不会扣我钱，所以用了MyISAM。毕竟就是大量的Insert和select
CREATE DATABASE `douban`;
USE `douban`;
-- 基本信息表
CREATE TABLE `t_movie_info` (
`id` bigint(20) unsigned NOT NULL COMMENT '主键，豆瓣电影id',
`type` tinyint(4) DEFAULT NULL COMMENT '类型 0：电视剧，1：电影',
`name` varchar(30) DEFAULT NULL COMMENT '电影名字',
`director` varchar(50) DEFAULT NULL COMMENT '导演',
`year` int(4) DEFAULT NULL COMMENT '上映年份',
`month` int(2) DEFAULT NULL COMMENT '上映月份',
`day` int(2) DEFAULT NULL COMMENT '上映日期',
`categories1` varchar(20) DEFAULT NULL COMMENT '所属类目1',
`categories2` varchar(20) DEFAULT NULL COMMENT '所属类目2',
`time` int(3) DEFAULT NULL COMMENT '时长',
PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8
-- 主演表
CREATE TABLE `t_movie_actors` (
`id` bigint(20) unsigned NOT NULL COMMENT '主键，豆瓣电影id',
`actor1` varchar(50) DEFAULT NULL,
`actor2` varchar(50) DEFAULT NULL,
`actor3` varchar(50) DEFAULT NULL,
`actor4` varchar(50) DEFAULT NULL,
`actor5` varchar(50) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8
-- 评价数据表
CREATE TABLE `t_movie_scores` (
`id` bigint(20) unsigned NOT NULL COMMENT '主键，电影id',
`score` double unsigned DEFAULT '0' COMMENT '评分',
`votes` int(10) unsigned DEFAULT '0' COMMENT '评价人数',
`star1` double unsigned DEFAULT '0' COMMENT '1星比例',
`star2` double unsigned DEFAULT '0' COMMENT '2星比例',
`star3` double unsigned DEFAULT '0' COMMENT '3星比例',
`star4` double unsigned DEFAULT '0' COMMENT '4星比例',
`star5` double unsigned DEFAULT '0' COMMENT '5星比例',
PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8
5. 写一个方法把数据插入到数据库里。 也是第一次用python写数据到数据库，折腾了一晚上。 也不知道哪个小菜比写的 %s 不用加引号，搞得我第一次就看到这个，然后出了错一直认为这个是对的，在找别的原因
def inset_data(movie):
# 获取一个数据库连接
conn = pymysql.Connect(host="localhost", port=3306, user="root", password="root", db="douban")
# conn.autocommit(True) # 设置自动提交
cursor = conn.cursor() # 获取游标
sql_insert_info = ("insert into `t_movie_info`(`id`, `type`, `name`, `director`, `year`, `month`, `day`, "
"`categories1`, `categories2`, `time`) values (%d, %d, '%s', '%s', %d, %d, %d, '%s', '%s', %d)")
categories = movie["categories"]
ca_len = len(categories)
categories1 = categories[0] if ca_len > 0 else None
categories2 = categories[1] if ca_len > 1 else None
cursor.execute(sql_insert_info % (movie["id"], movie["type"], movie["name"], movie["directer"], movie["date"].year,
movie["date"].month, movie["date"].day, categories1, categories2, movie["time"]))
# 写sql 千万记住 %s 要加双引号，不然会报错 Unknown column 'a' in 'field list'
sql_insert_actors = ("insert into `t_movie_actors`(id, actor1, actor2, actor3, actor4, actor5)"
"values(%d, '%s', '%s', '%s', '%s', '%s')")
actors = movie["actors"]
actors_len = len(actors)
actor1 = actors[0] if actors_len > 0 else None
actor2 = actors[1] if actors_len > 1 else None
actor3 = actors[2] if actors_len > 2 else None
actor4 = actors[3] if actors_len > 3 else None
actor5 = actors[4] if actors_len > 4 else None
cursor.execute(sql_insert_actors % (movie["id"], actor1, actor2, actor3, actor4, actor5))
sql_insert_scores = ("insert into `t_movie_scores`(id, score, votes, star1, star2, star3, star4, star5)"
"values(%d, %f, %d, %f, %f, %f, %f, %f)")
stars = movie["stars"]
stars_len = len(stars)
star1 = stars[0] if stars_len > 0 else 0.0
star2 = stars[1] if stars_len > 1 else 0.0
star3 = stars[2] if stars_len > 2 else 0.0
star4 = stars[3] if stars_len > 3 else 0.0
star5 = stars[4] if stars_len > 4 else 0.0
cursor.execute(sql_insert_scores % (movie["id"], movie["score"], movie["vote"], star1, star2, star3, star4, star5))
conn.commit()
data1 = douban_movie("https://movie.douban.com/subject/30236775/?from=showing")
inset_data(data1)
data2 = douban_movie("https://movie.douban.com/subject/26842702/?tag=%E7%83%AD%E9%97%A8&from=gaia")
inset_data(data2)
data3 = douban_movie("https://movie.douban.com/subject/26973784/?tag=%E6%9C%80%E6%96%B0&from=gaia")
inset_data(data3)
data4 = douban_movie("https://movie.douban.com/subject/30249296/?tag=%E7%83%AD%E9%97%A8&from=gaia")
inset_data(data4)
