X-Git-Url: https://code.communitydata.science/cdsc_reddit.git/blobdiff_plain/a60747292e91a47d122158659182f82bfd2e922a..e6294b5b90135a5163441c8dc62252dd6a188412:/similarities/tfidf.py

diff --git a/similarities/tfidf.py b/similarities/tfidf.py
new file mode 100644
index 0000000..5b1c0c9
--- /dev/null
+++ b/similarities/tfidf.py
@@ -0,0 +1,73 @@
+import fire
+from pyspark.sql import SparkSession
+from pyspark.sql import functions as f
+from similarities_helper import build_tfidf_dataset, build_weekly_tfidf_dataset, select_topN_subreddits
+
+
+def _tfidf_wrapper(func, inpath, outpath, topN, term_colname, exclude):
+    spark = SparkSession.builder.getOrCreate()
+
+    df = spark.read.parquet(inpath)
+
+    df = df.filter(~ f.col(term_colname).isin(exclude))
+
+    include_subs = select_topN_subreddits(topN)
+
+    df = func(df, include_subs, term_colname)
+
+    df.write.parquet(outpath,mode='overwrite',compression='snappy')
+
+    spark.stop()
+
+def tfidf(inpath, outpath, topN, term_colname, exclude):
+    return _tfidf_wrapper(build_tfidf_dataset, inpath, outpath, topN, term_colname, exclude)
+
+def tfidf_weekly(inpath, outpath, topN, term_colname, exclude):
+    return _tfidf_wrapper(build_weekly_tfidf_dataset, inpath, outpath, topN, term_colname, exclude)
+
+def tfidf_authors(outpath='/gscratch/comdata/output/reddit_similarity/tfidf/comment_authors.parquet',
+                  topN=25000):
+
+    return tfidf("/gscratch/comdata/output/reddit_ngrams/comment_authors.parquet",
+                 outpath,
+                 topN,
+                 'author',
+                 ['[deleted]','AutoModerator']
+                 )
+
+def tfidf_terms(outpath='/gscratch/comdata/output/reddit_similarity/tfidf/comment_terms.parquet',
+                topN=25000):
+
+    return tfidf("/gscratch/comdata/output/reddit_ngrams/comment_terms.parquet",
+                 outpath,
+                 topN,
+                 'term',
+                 []
+                 )
+
+def tfidf_authors_weekly(outpath='/gscratch/comdata/output/reddit_similarity/tfidf/comment_authors.parquet',
+                  topN=25000):
+
+    return tfidf_weekly("/gscratch/comdata/output/reddit_ngrams/comment_authors.parquet",
+                 outpath,
+                 topN,
+                 'author',
+                 ['[deleted]','AutoModerator']
+                 )
+
+def tfidf_terms_weekly(outpath='/gscratch/comdata/output/reddit_similarity/tfidf/comment_terms.parquet',
+                topN=25000):
+
+    return tfidf_weekly("/gscratch/comdata/output/reddit_ngrams/comment_terms.parquet",
+                 outpath,
+                 topN,
+                 'term',
+                 []
+                 )
+
+
+if __name__ == "__main__":
+    fire.Fire({'authors':tfidf_authors,
+               'terms':tfidf_terms,
+               'authors_weekly':tfidf_authors_weekly,
+               'terms_weekly':tfidf_terms_weekly})