X-Git-Url: https://code.communitydata.science/cdsc_reddit.git/blobdiff_plain/e6294b5b90135a5163441c8dc62252dd6a188412..07b0dff9bc0dae2ab6f7fb7334007a5269a512ad:/ngrams/top_comment_phrases.py

diff --git a/ngrams/top_comment_phrases.py b/ngrams/top_comment_phrases.py
deleted file mode 100644
index 031cba5..0000000
--- a/ngrams/top_comment_phrases.py
+++ /dev/null
@@ -1,58 +0,0 @@
-from pyspark.sql import functions as f
-from pyspark.sql import Window
-from pyspark.sql import SparkSession
-import numpy as np
-
-spark = SparkSession.builder.getOrCreate()
-df = spark.read.text("/gscratch/comdata/users/nathante/reddit_comment_ngrams_10p_sample/")
-
-df = df.withColumnRenamed("value","phrase")
-
-# count phrase occurrances
-phrases = df.groupby('phrase').count()
-phrases = phrases.withColumnRenamed('count','phraseCount')
-phrases = phrases.filter(phrases.phraseCount > 10)
-
-
-# count overall
-N = phrases.select(f.sum(phrases.phraseCount).alias("phraseCount")).collect()[0].phraseCount
-
-print(f'analyzing PMI on a sample of {N} phrases') 
-logN = np.log(N)
-phrases = phrases.withColumn("phraseLogProb", f.log(f.col("phraseCount")) - logN)
-
-# count term occurrances
-phrases = phrases.withColumn('terms',f.split(f.col('phrase'),' '))
-terms = phrases.select(['phrase','phraseCount','phraseLogProb',f.explode(phrases.terms).alias('term')])
-
-win = Window.partitionBy('term')
-terms = terms.withColumn('termCount',f.sum('phraseCount').over(win))
-terms = terms.withColumnRenamed('count','termCount')
-terms = terms.withColumn('termLogProb',f.log(f.col('termCount')) - logN)
-
-terms = terms.groupBy(terms.phrase, terms.phraseLogProb, terms.phraseCount).sum('termLogProb')
-terms = terms.withColumnRenamed('sum(termLogProb)','termsLogProb')
-terms = terms.withColumn("phrasePWMI", f.col('phraseLogProb') - f.col('termsLogProb'))
-
-# join phrases to term counts
-
-
-df = terms.select(['phrase','phraseCount','phraseLogProb','phrasePWMI'])
-
-df = df.sort(['phrasePWMI'],descending=True)
-df = df.sortWithinPartitions(['phrasePWMI'],descending=True)
-df.write.parquet("/gscratch/comdata/users/nathante/reddit_comment_ngrams_pwmi.parquet/",mode='overwrite',compression='snappy')
-
-df = spark.read.parquet("/gscratch/comdata/users/nathante/reddit_comment_ngrams_pwmi.parquet/")
-
-df.write.csv("/gscratch/comdata/users/nathante/reddit_comment_ngrams_pwmi.csv/",mode='overwrite',compression='none')
-
-df = spark.read.parquet("/gscratch/comdata/users/nathante/reddit_comment_ngrams_pwmi.parquet")
-df = df.select('phrase','phraseCount','phraseLogProb','phrasePWMI')
-
-# choosing phrases occurring at least 3500 times in the 10% sample (35000 times) and then with a PWMI of at least 3 yeids about 65000 expressions.
-#
-df = df.filter(f.col('phraseCount') > 3500).filter(f.col("phrasePWMI")>3)
-df = df.toPandas()
-df.to_feather("/gscratch/comdata/users/nathante/reddit_multiword_expressions.feather")
-df.to_csv("/gscratch/comdata/users/nathante/reddit_multiword_expressions.csv")