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27 lines
1.2 KiB
27 lines
1.2 KiB
6 months ago
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import csv
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import pandas as pd
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from sklearn.feature_extraction.text import TfidfVectorizer
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from sklearn.metrics.pairwise import cosine_similarity
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def tf_idf(items, user):
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# 数据载入
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articles = items
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df = pd.DataFrame(articles)
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# 提取TF-IDF特征
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tfidf_vectorizer = TfidfVectorizer()
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tfidf_matrix = tfidf_vectorizer.fit_transform(df['content'])
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# 计算余弦相似度
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cosine_sim = cosine_similarity(tfidf_matrix, tfidf_matrix)
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# 根据相似度推荐
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def recommend_articles(article_id, user, cosine_sim=cosine_sim):
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sim_scores = list(enumerate(cosine_sim[article_id - 1]))
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sim_scores = sorted(sim_scores, key=lambda x: x[1], reverse=True)
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sim_scores = sim_scores[1:6] # 推荐前5个相似文章
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article_indices = [i[0] for i in sim_scores]
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with open('collections/{}.csv'.format(user), 'a+', encoding='utf-8',newline='') as f:
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write=csv.DictWriter(f,fieldnames=['文章ID','content','时间','收藏数量','喜欢数量','图片资源'])
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for j in article_indices:
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write.writerow(items[j])
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# 推荐与文章ID为1的旅游攻略相似的文章
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recommend_articles(1,user)
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