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[cdsc_reddit.git] / similarities / tfidf.py
1 import fire
2 from pyspark.sql import SparkSession
3 from pyspark.sql import functions as f
4 from similarities_helper import build_tfidf_dataset, build_weekly_tfidf_dataset, select_topN_subreddits
5
6 def _tfidf_wrapper(func, inpath, outpath, topN, term_colname, exclude, included_subreddits):
7     spark = SparkSession.builder.getOrCreate()
8
9     df = spark.read.parquet(inpath)
10
11     df = df.filter(~ f.col(term_colname).isin(exclude))
12
13     if included_subreddits is not None:
14         include_subs = list(open(included_subreddits))
15     else:
16         include_subs = select_topN_subreddits(topN)
17
18     df = func(df, include_subs, term_colname)
19
20     df.write.parquet(outpath,mode='overwrite',compression='snappy')
21
22     spark.stop()
23
24 def tfidf(inpath, outpath, topN, term_colname, exclude, included_subreddits):
25     return _tfidf_wrapper(build_tfidf_dataset, inpath, outpath, topN, term_colname, exclude, included_subreddits)
26
27 def tfidf_weekly(inpath, outpath, topN, term_colname, exclude):
28     return _tfidf_wrapper(build_weekly_tfidf_dataset, inpath, outpath, topN, term_colname, included_subreddits)
29
30 def tfidf_authors(outpath='/gscratch/comdata/output/reddit_similarity/tfidf/comment_authors.parquet',
31                   topN=25000):
32
33     return tfidf("/gscratch/comdata/output/reddit_ngrams/comment_authors.parquet",
34                  outpath,
35                  topN,
36                  'author',
37                  ['[deleted]','AutoModerator'],
38                  included_subreddits=None
39                  )
40
41 def tfidf_terms(outpath='/gscratch/comdata/output/reddit_similarity/tfidf/comment_terms.parquet',
42                 topN=25000):
43
44     return tfidf("/gscratch/comdata/output/reddit_ngrams/comment_terms.parquet",
45                  outpath,
46                  topN,
47                  'term',
48                  [],
49                  included_subreddits=None
50                  )
51
52 def tfidf_authors_weekly(outpath='/gscratch/comdata/output/reddit_similarity/tfidf_weekly/comment_authors.parquet',
53                          topN=25000):
54
55     return tfidf_weekly("/gscratch/comdata/output/reddit_ngrams/comment_authors.parquet",
56                         outpath,
57                         topN,
58                         'author',
59                         ['[deleted]','AutoModerator'],
60                         included_subreddits=None
61                         )
62
63 def tfidf_terms_weekly(outpath='/gscratch/comdata/output/reddit_similarity/tfidf_weekly/comment_terms.parquet',
64                        topN=25000):
65
66
67     return tfidf_weekly("/gscratch/comdata/output/reddit_ngrams/comment_terms.parquet",
68                         outpath,
69                         topN,
70                         'term',
71                         [],
72                         included_subreddits=None
73                         )
74
75
76 if __name__ == "__main__":
77     fire.Fire({'authors':tfidf_authors,
78                'terms':tfidf_terms,
79                'authors_weekly':tfidf_authors_weekly,
80                'terms_weekly':tfidf_terms_weekly})

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