144 lines
7.2 KiB
Python
Executable File
144 lines
7.2 KiB
Python
Executable File
#!/usr/bin/env python3
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from pyspark.sql import functions as f
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from pyspark.sql import SparkSession
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from pyspark.sql import Window
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import numpy as np
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import pyarrow
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import pyarrow.dataset as ds
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import pandas as pd
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import fire
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from itertools import islice, chain
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from pathlib import Path
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from similarities_helper import pull_tfidf, column_similarities, write_weekly_similarities, lsi_column_similarities
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from scipy.sparse import csr_matrix
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from multiprocessing import Pool, cpu_count
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from functools import partial
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infile = "/gscratch/comdata/output/reddit_similarity/tfidf_weekly/comment_authors_10k.parquet"
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tfidf_path = "/gscratch/comdata/users/nathante/competitive_exclusion_reddit/data/tfidf/comment_authors_compex.parquet"
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min_df=None
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included_subreddits="/gscratch/comdata/users/nathante/competitive_exclusion_reddit/data/included_subreddits.txt"
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max_df = None
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topN=100
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term_colname='author'
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# outfile = '/gscratch/comdata/output/reddit_similarity/weekly/comment_authors_test.parquet'
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# included_subreddits=None
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def _week_similarities(week, simfunc, tfidf_path, term_colname, min_df, max_df, included_subreddits, topN, outdir:Path, subreddit_names, nterms):
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term = term_colname
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term_id = term + '_id'
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term_id_new = term + '_id_new'
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print(f"loading matrix: {week}")
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entries = pull_tfidf(infile = tfidf_path,
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term_colname=term_colname,
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min_df=min_df,
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max_df=max_df,
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included_subreddits=included_subreddits,
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topN=topN,
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week=week,
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rescale_idf=False)
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tfidf_colname='tf_idf'
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# if the max subreddit id we found is less than the number of subreddit names then we have to fill in 0s
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mat = csr_matrix((entries[tfidf_colname],(entries[term_id_new]-1, entries.subreddit_id_new-1)),shape=(nterms,subreddit_names.shape[0]))
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print('computing similarities')
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sims = simfunc(mat)
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del mat
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sims = pd.DataFrame(sims)
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sims = sims.rename({i: sr for i, sr in enumerate(subreddit_names.subreddit.values)}, axis=1)
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sims['_subreddit'] = subreddit_names.subreddit.values
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outfile = str(Path(outdir) / str(week))
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write_weekly_similarities(outfile, sims, week, subreddit_names)
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def pull_weeks(batch):
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return set(batch.to_pandas()['week'])
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# This requires a prefit LSI model, since we shouldn't fit different LSI models for every week.
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def cosine_similarities_weekly_lsi(n_components=100, lsi_model=None, *args, **kwargs):
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term_colname= kwargs.get('term_colname')
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#lsi_model = "/gscratch/comdata/users/nathante/competitive_exclusion_reddit/data/similarity/comment_terms_compex_LSI/1000_term_LSIMOD.pkl"
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# simfunc = partial(lsi_column_similarities,n_components=n_components,n_iter=n_iter,random_state=random_state,algorithm='randomized',lsi_model_load=lsi_model)
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simfunc = partial(lsi_column_similarities,n_components=n_components,n_iter=kwargs.get('n_iter'),random_state=kwargs.get('random_state'),algorithm=kwargs.get('algorithm'),lsi_model_load=lsi_model)
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return cosine_similarities_weekly(*args, simfunc=simfunc, **kwargs)
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#tfidf = spark.read.parquet('/gscratch/comdata/users/nathante/subreddit_tfidf_weekly.parquet')
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def cosine_similarities_weekly(tfidf_path, outfile, term_colname, min_df = None, max_df=None, included_subreddits = None, topN = 500, simfunc=column_similarities):
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print(outfile)
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# do this step in parallel if we have the memory for it.
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# should be doable with pool.map
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spark = SparkSession.builder.getOrCreate()
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df = spark.read.parquet(tfidf_path)
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# load subreddits + topN
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subreddit_names = df.select(['subreddit','subreddit_id']).distinct().toPandas()
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subreddit_names = subreddit_names.sort_values("subreddit_id")
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nterms = df.select(f.max(f.col(term_colname + "_id")).alias('max')).collect()[0].max
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weeks = df.select(f.col("week")).distinct().toPandas().week.values
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spark.stop()
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print(f"computing weekly similarities")
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week_similarities_helper = partial(_week_similarities,simfunc=simfunc, tfidf_path=tfidf_path, term_colname=term_colname, outdir=outfile, min_df=min_df,max_df=max_df,included_subreddits=included_subreddits,topN=topN, subreddit_names=subreddit_names,nterms=nterms)
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pool = Pool(cpu_count())
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list(pool.imap(week_similarities_helper,weeks))
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pool.close()
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# with Pool(cpu_count()) as pool: # maybe it can be done with 40 cores on the huge machine?
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def author_cosine_similarities_weekly(outfile, infile='/gscratch/comdata/output/reddit_similarity/tfidf_weekly/comment_authors_test.parquet', min_df=2, max_df=None, included_subreddits=None, topN=500):
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return cosine_similarities_weekly(infile,
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outfile,
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'author',
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min_df,
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max_df,
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included_subreddits,
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topN)
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def term_cosine_similarities_weekly(outfile, infile='/gscratch/comdata/output/reddit_similarity/tfidf_weekly/comment_terms.parquet', min_df=None, max_df=None, included_subreddits=None, topN=None):
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return cosine_similarities_weekly(infile,
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outfile,
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'term',
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min_df,
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max_df,
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included_subreddits,
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topN)
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def author_cosine_similarities_weekly_lsi(outfile, infile = '/gscratch/comdata/output/reddit_similarity/tfidf_weekly/comment_authors_test.parquet', min_df=2, max_df=None, included_subreddits=None, topN=None,n_components=100,lsi_model=None):
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return cosine_similarities_weekly_lsi(infile,
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outfile,
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'author',
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min_df,
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max_df,
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included_subreddits,
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topN,
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n_components=n_components,
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lsi_model=lsi_model)
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def term_cosine_similarities_weekly_lsi(outfile, infile = '/gscratch/comdata/output/reddit_similarity/tfidf_weekly/comment_terms.parquet', min_df=None, max_df=None, included_subreddits=None, topN=500,n_components=100,lsi_model=None):
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return cosine_similarities_weekly_lsi(infile,
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outfile,
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'term',
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min_df,
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max_df,
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included_subreddits,
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topN,
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n_components=n_components,
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lsi_model=lsi_model)
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if __name__ == "__main__":
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fire.Fire({'authors':author_cosine_similarities_weekly,
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'terms':term_cosine_similarities_weekly,
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'authors-lsi':author_cosine_similarities_weekly_lsi,
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'terms-lsi':term_cosine_similarities_weekly
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})
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