本文使用小笨羊推荐应用和服务,对MovieLens数据,端到端的搭建完整的电影推荐网站。
演示网址: https://app.aboutdata.top/movie/#/movie
小笨羊网址: https://xiaobenyang.com/
如有问题,请联系小笨羊微信:
具体内容如下,
搭建一套完整的电影推荐网站,需要下面功能,
模型 | 功能 |
排行榜 | 热门电影排行榜 |
训练U2I模型 | 用于用户登录后的首页推荐 |
训练I2I模型 | 用户进入电影页面之后推荐 |
查询模型1 | 按打分查询电影 |
查询模型2 | 按电影 查询用户电影评分. |
MovieLens是推荐系统的经典数据集,包含用户对电影的打分,用户信息,电影信息等数据。
第一步, 准备三个数据,分别是用户表,物品表(电影),行为表(用户对电影的打分)
用户表存放的是用户的相关信息,包括性别、年龄、职业。
列名 | 类型 | 描述 | 备注 |
user_id | long | 用户ID | |
age | int | 年龄 | 数值特征 |
gender | string | 性别 | 类别特征: M代表男性,F代表女性 |
occupation | string | 职业 | 类别特征:20中种职业 |
zip_code | string | 邮政编码 | 前两位数字:代表省级行政区, 中间两位数字:代表地级行政区。 可以用邮政编码抽取处理特征。同样还有地址抽取,ip抽取等和位置相关的特征 |
物品表存放的是电影的相关信息,即电影id、电影标题、电影类型
列名 | 类型 | 描述 |
movie_id | long | 电影ID |
title | string | 电影名称,语义进入精排模型 |
release_date | string | 发布日期 |
video_release_date | string | 视频发布日期 |
imdb_url | string | 链接 |
其他列是影片类型 | int | OneHot之后的数据: 如果是此类影片值是1, 不是值是0。不需要再进行数据处理,直接进入模型即可。 |
行为表是打分数据,包含用户id、电影id、该用户对此电影的评分、时间。
列名 | 类型 | 描述 |
user_id | long | 用户ID |
movie_id | long | 电影ID |
rating | float | 打分 |
ts | long | 打分时间,以秒为单位的时间戳; 可用来构造用户的序列行为特征,即用户最近n次的打分行为。 |
一共需要如下五个模型:
模型 | 描述 |
排行榜 | 热门电影排行榜 |
训练U2I模型 | 用于用户登录后的首页推荐 |
训练I2I模型 | 用户进入电影页面之后推荐 |
查询模型1 | 按打分查询电影 |
查询模型2 | 按电影 查询用户电影评分. |
一般电影推荐网页的首页,会有热门电影排行榜和猜你喜欢两部分。榜单可以非常丰富,按照类别的榜单,按照性别的榜单,按照地域的榜单,不同类别之间的对比等等。
下图例子中的右侧是按照播放次数倒排的电影排行榜。
可以直接用1.1导入教程示例查看使用,也可以按照1.2的步骤直接训练模型。
可以直接导入教程示例查看使用,也可以按照1.2的步骤训练模型。
任务帖子链接:https://xiaobenyang.com/discuss-post?id=134
点击"导入",将任务导入自己的项目直接查看。
参数介绍:
参数 | 取值 | 介绍 |
主体列 | movie_id | 按照电影ID做汇总 |
计算列 | rating | 计算打分(rating)的次数(count),用于排名 |
统计类型 | count | |
是否降序 | 是 | 排名按照降序排序 |
个数 | 10 | 返回排名前10的数据 |
附加列 | ["title"] | 除了返回统计量之外,也返回title(电影标题列) |
预测服务名称 | 应用示例/电影/排行榜B |
以Vue为例,
var axios = require('axios')
//设置小笨羊API访问URL
axios.defaults.baseURL = 'https://xiaobenyang.com/pred'
// 设置访问ApiKey, 在管理页面查询https://xiaobenyang.com/calc?func=LabPage&proc=ListMyApikey
axios.defaults.headers.common['APIKEY'] = '*'
axios.post(null, {
'predServId': '40',
'clause': ''
})
参数介绍
参数 | 描述 | 介绍 |
predServId | 服务ID | 在服务列表里查询 |
clause | 表达式 | ''是所有数据 |
[
{
"pred": "[{\"rank\":1,\"movie_id\":50,\"title\":\"Star Wars (1977)\",\"rating_count\":583.0},{\"rank\":2,\"movie_id\":258,\"title\":\"Contact (1997)\",\"rating_count\":509.0},{\"rank\":3,\"movie_id\":100,\"title\":\"Fargo (1996)\",\"rating_count\":508.0},{\"rank\":4,\"movie_id\":181,\"title\":\"Return of the Jedi (1983)\",\"rating_count\":507.0},{\"rank\":5,\"movie_id\":294,\"title\":\"Liar Liar (1997)\",\"rating_count\":485.0},{\"rank\":6,\"movie_id\":286,\"title\":\"English Patient, The (1996)\",\"rating_count\":481.0},{\"rank\":7,\"movie_id\":288,\"title\":\"Scream (1996)\",\"rating_count\":478.0},{\"rank\":8,\"movie_id\":1,\"title\":\"Toy Story (1995)\",\"rating_count\":452.0},{\"rank\":9,\"movie_id\":300,\"title\":\"Air Force One (1997)\",\"rating_count\":431.0},{\"rank\":10,\"movie_id\":121,\"title\":\"Independence Day (ID4) (1996)\",\"rating_count\":429.0}]",
"__alink_lookup_id__": 0
}
]
首页推荐,也就是猜你喜欢,用来推荐用户感兴趣的电影。使用热门召回和ALS召回,解决冷启动和个性化推荐的需求。这部分用户上来就会看到,非常重要。下图左侧是猜你喜欢的示例,
可以直接导入教程示例查看使用,也可以按照1.2的步骤训练模型。
任务帖子链接:https://xiaobenyang.com/discuss-post?id=133
点击"导入",将任务导入自己的项目查看。
这里使用推荐系统应用训练模型,包含召回和精排
这里使用了同一个行为表作为召回和精排的训练数据,实际应用中召回训练数据和精排训练数据是不同的,需要根据业务情况精心设计负样本。召回一般用随机采样全部行为作为负样本,精排一般是用曝光之后没有点击(评分)作为负样本。
以Vue为例,设置user_id
var axios = require('axios')
// 设置小笨羊API访问URL
axios.defaults.baseURL = 'https://xiaobenyang.com/pred'
// 设置访问ApiKey, 在管理页面查询https://xiaobenyang.com/calc?func=LabPage&proc=ListMyApikey
axios.defaults.headers.common['APIKEY'] = '*'
axios.post(null, {
'predServId': '39',
'user_id': userId
})
参数介绍
参数 | 描述 | 介绍 |
predServId | 服务ID | 在服务列表里查询 |
user_id | 用户ID |
[
{
"score": 0.6648386815137506,
"user_id": 22,
"imdb_url": "http://us.imdb.com/M/title-exact?Usual%20Suspects,%20The%20(1995)",
"movie_id": 12,
"title": "Usual Suspects, The (1995)"
},
{
"score": 0.6563065434252864,
"user_id": 22,
"imdb_url": "http://us.imdb.com/M/title-exact?Star%20Wars%20(1977)",
"movie_id": 50,
"title": "Star Wars (1977)"
},
{
"score": 0.6282466883685336,
"user_id": 22,
"imdb_url": "http://us.imdb.com/M/title-exact?Empire%20Strikes%20Back,%20The%20(1980)",
"movie_id": 172,
"title": "Empire Strikes Back, The (1980)"
},
{
"score": 0.6280127697511231,
"user_id": 22,
"imdb_url": "http://us.imdb.com/M/title-exact?Princess%20Bride,%20The%20(1987)",
"movie_id": 173,
"title": "Princess Bride, The (1987)"
},
{
"score": 0.6277787911507777,
"user_id": 22,
"imdb_url": "http://us.imdb.com/M/title-exact?Raiders%20of%20the%20Lost%20Ark%20(1981)",
"movie_id": 174,
"title": "Raiders of the Lost Ark (1981)"
},
{
"score": 0.6256703001101849,
"user_id": 22,
"imdb_url": "http://us.imdb.com/M/title-exact?Alien%20(1979)",
"movie_id": 183,
"title": "Alien (1979)"
},
{
"score": 0.33804561940672695,
"user_id": 22,
"imdb_url": "http://us.imdb.com/M/title-exact?Faust%20%281994%29",
"movie_id": 1367,
"title": "Faust (1994)"
},
{
"score": 0.3168786077333079,
"user_id": 22,
"imdb_url": "http://us.imdb.com/M/title-exact?imdb-title-118764",
"movie_id": 1463,
"title": "Boys, Les (1997)"
},
{
"score": 0.30891279055970633,
"user_id": 22,
"imdb_url": "http://us.imdb.com/M/title-exact?Santa%20with%20Muscles%20(1996)",
"movie_id": 1500,
"title": "Santa with Muscles (1996)"
},
{
"score": 0.27920416768385836,
"user_id": 22,
"imdb_url": "http://us.imdb.com/Title?Angel+Baby+(1995/I)",
"movie_id": 1643,
"title": "Angel Baby (1995)"
}
]
指定电影ID, 推荐相似的电影
可以直接导入教程示例查看使用,也可以按照1.2的步骤训练模型。
任务帖子链接:https://xiaobenyang.com/discuss-post?id=135
点击"导入",将任务导入自己的项目查看。
以Vue为例,设置movie_id, 推荐相似电影列表,并关联电影信息
var axios = require('axios')
//设置小笨羊API访问URL
axios.defaults.baseURL = 'https://xiaobenyang.com/pred'
// 设置访问ApiKey, 在管理页面查询https://xiaobenyang.com/calc?func=LabPage&proc=ListMyApikey
axios.defaults.headers.common['APIKEY'] = '*'
axios.post(null, {
'predServId': '43',
"movie_id": this.movieId
})
{
"recom": "[{\"score\":3.739997579363967,\"movie_id\":173,\"title\":\"Princess Bride, The (1987)\"},{\"score\":3.715278204571951,\"movie_id\":169,\"title\":\"Wrong Trousers, The (1993)\"},{\"score\":3.69654889421144,\"movie_id\":1169,\"title\":\"Fresh (1994)\"},{\"score\":3.666642062382044,\"movie_id\":64,\"title\":\"Shawshank Redemption, The (1994)\"},{\"score\":3.633121867118959,\"movie_id\":114,\"title\":\"Wallace & Gromit: The Best of Aardman Animation (1996)\"},{\"score\":3.632576019023612,\"movie_id\":318,\"title\":\"Schindler's List (1993)\"},{\"score\":3.6205990685449594,\"movie_id\":174,\"title\":\"Raiders of the Lost Ark (1981)\"},{\"score\":3.6162683197891154,\"movie_id\":408,\"title\":\"Close Shave, A (1995)\"},{\"score\":3.604905994911123,\"movie_id\":50,\"title\":\"Star Wars (1977)\"},{\"score\":3.5979400813672933,\"movie_id\":613,\"title\":\"My Man Godfrey (1936)\"}]",
"movie_id": 2
}
这是"统计和查询"模型, 查询电影所有的评分记录
可以直接导入教程示例查看使用,也可以按照1.2的步骤训练模型。
任务帖子链接:https://xiaobenyang.com/discuss-post?id=132
点击"导入",将任务导入自己的项目查看。
指定电影平均分和打分次数, 搜索所有满足条件的电影,并关联电影信息(电影名称和电影类型)
var axios = require('axios')
//设置小笨羊API访问URL
axios.defaults.baseURL = 'https://xiaobenyang.com/pred'
// 设置访问ApiKey, 在管理页面查询https://xiaobenyang.com/calc?func=LabPage&proc=ListMyApikey
axios.defaults.headers.common['APIKEY'] = '*'
axios.post(null, {
'predServId': '41',
'clause': 'movie_id=' + this.movieId
})
{
"clause": "movie_id=2",
"pred": "[{\"user_id\":5,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":875636053},{\"user_id\":268,\"rating\":2.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":875744173},{\"user_id\":276,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":874792436},{\"user_id\":217,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":889069782},{\"user_id\":87,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":879876074},{\"user_id\":250,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":878090414},{\"user_id\":201,\"rating\":2.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":884112487},{\"user_id\":64,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":889737609},{\"user_id\":13,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":882397650},{\"user_id\":95,\"rating\":2.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":888955909},{\"user_id\":213,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":878955914},{\"user_id\":373,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":877100416},{\"user_id\":293,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":888907101},{\"user_id\":193,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":890860198},{\"user_id\":363,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":891495809},{\"user_id\":256,\"rating\":5.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":882164480},{\"user_id\":200,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":884130046},{\"user_id\":207,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":877822770},{\"user_id\":393,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":887746206},{\"user_id\":222,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":878183837},{\"user_id\":399,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":882512708},{\"user_id\":301,\"rating\":2.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":882076587},{\"user_id\":379,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":880525540},{\"user_id\":387,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":886483195},{\"user_id\":92,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":875653699},{\"user_id\":450,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":882474001},{\"user_id\":303,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":879467191},{\"user_id\":178,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":882827375},{\"user_id\":83,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":881971771},{\"user_id\":407,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":875553509},{\"user_id\":327,\"rating\":2.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":887820385},{\"user_id\":1,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":876893171},{\"user_id\":325,\"rating\":1.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":891478772},{\"user_id\":455,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":879111786},{\"user_id\":30,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":875061066},{\"user_id\":320,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":884749281},{\"user_id\":405,\"rating\":1.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":885547953},{\"user_id\":466,\"rating\":1.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":890284819},{\"user_id\":536,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":882360227},{\"user_id\":346,\"rating\":5.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":875263473},{\"user_id\":197,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":891409981},{\"user_id\":72,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":880037376},{\"user_id\":110,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":886988536},{\"user_id\":600,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":888451908},{\"user_id\":622,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":882671363},{\"user_id\":551,\"rating\":2.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":892784780},{\"user_id\":618,\"rating\":2.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":891309091},{\"user_id\":495,\"rating\":2.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":888635595},{\"user_id\":497,\"rating\":1.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":879310883},{\"user_id\":429,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":882387599},{\"user_id\":280,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":891701278},{\"user_id\":398,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":875718614},{\"user_id\":660,\"rating\":2.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":891201151},{\"user_id\":653,\"rating\":1.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":880151839},{\"user_id\":378,\"rating\":2.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":880333851},{\"user_id\":130,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye 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(1995)\",\"ts\":888069606},{\"user_id\":807,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":892978338},{\"user_id\":886,\"rating\":4.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":876033368},{\"user_id\":889,\"rating\":3.0,\"__alink_avg__\":3.206107,\"movie_id\":2,\"title\":\"GoldenEye (1995)\",\"ts\":880182460}]"
}
这是"统计和查询"模型, 查询电影所有的评分记录
可以直接导入教程示例查看使用,也可以按照1.2的步骤训练模型。
任任务帖子链接:https://xiaobenyang.com/discuss-post?id=131
点击"导入",将任务导入自己的项目查看。
指定电影ID, 搜索所有评分记录,并计算平均评分
var axios = require('axios')
//设置小笨羊API访问URL
axios.defaults.baseURL = 'https://xiaobenyang.com/pred'
// 设置访问ApiKey, 在管理页面查询https://xiaobenyang.com/calc?func=LabPage&proc=ListMyApikey
axios.defaults.headers.common['APIKEY'] = '*'
axios.post(null, {
'predServId': '42',
'clause': '__alink_avg__ >= ' + this.minAvgRating + " and " + '__alink_count__>= ' + this.minCount
})
{
"clause": "movie_id=2",
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}
本示例使用Vue2, 调用第二步中部署的模型预测服务。