X-Git-Url: https://code.communitydata.science/cdsc_reddit.git/blobdiff_plain/4ec9c1424711eb81edf6b6431d5dfae360013174..HEAD:/submissions_2_parquet_part1.py diff --git a/submissions_2_parquet_part1.py b/submissions_2_parquet_part1.py deleted file mode 100755 index 10bb5f0..0000000 --- a/submissions_2_parquet_part1.py +++ /dev/null @@ -1,172 +0,0 @@ -#!/usr/bin/env python3 - -# two stages: -# 1. from gz to arrow parquet (this script) -# 2. from arrow parquet to spark parquet (submissions_2_parquet_part2.py) - -from collections import defaultdict -from os import path -import glob -import json -import re -from datetime import datetime -from subprocess import Popen, PIPE -from multiprocessing import Pool, SimpleQueue - -dumpdir = "/gscratch/comdata/raw_data/reddit_dumps/submissions" - -def find_json_files(dumpdir): - base_pattern = "RS_20*.*" - - files = glob.glob(path.join(dumpdir,base_pattern)) - - # build a dictionary of possible extensions for each dump - dumpext = defaultdict(list) - for fpath in files: - fname, ext = path.splitext(fpath) - dumpext[fname].append(ext) - - ext_priority = ['.zst','.xz','.bz2'] - - for base, exts in dumpext.items(): - found = False - if len(exts) == 1: - yield base + exts[0] - found = True - else: - for ext in ext_priority: - if ext in exts: - yield base + ext - found = True - assert(found == True) - -files = list(find_json_files(dumpdir)) - -def read_file(fh): - lines = open_input_file(fh) - for line in lines: - yield line - -def open_fileset(files): - for fh in files: - print(fh) - lines = open_input_file(fh) - for line in lines: - yield line - -def open_input_file(input_filename): - if re.match(r'.*\.7z$', input_filename): - cmd = ["7za", "x", "-so", input_filename, '*'] - elif re.match(r'.*\.gz$', input_filename): - cmd = ["zcat", input_filename] - elif re.match(r'.*\.bz2$', input_filename): - cmd = ["bzcat", "-dk", input_filename] - elif re.match(r'.*\.bz', input_filename): - cmd = ["bzcat", "-dk", input_filename] - elif re.match(r'.*\.xz', input_filename): - cmd = ["xzcat",'-dk', '-T 20',input_filename] - elif re.match(r'.*\.zst',input_filename): - cmd = ['zstd','-dck', input_filename] - try: - input_file = Popen(cmd, stdout=PIPE).stdout - except NameError as e: - print(e) - input_file = open(input_filename, 'r') - return input_file - - -def parse_submission(post, names = None): - if names is None: - names = ['id','author','subreddit','title','created_utc','permalink','url','domain','score','ups','downs','over_18','has_media','selftext','retrieved_on','num_comments','gilded','edited','time_edited','subreddit_type','subreddit_id','subreddit_subscribers','name','is_self','stickied','is_submitter','quarantine','error'] - - try: - post = json.loads(post) - except (json.decoder.JSONDecodeError, UnicodeDecodeError) as e: - # print(e) - # print(post) - row = [None for _ in names] - row[-1] = "json.decoder.JSONDecodeError|{0}|{1}".format(e,post) - return tuple(row) - - row = [] - - for name in names: - if name == 'created_utc' or name == 'retrieved_on': - val = post.get(name,None) - if val is not None: - row.append(datetime.fromtimestamp(int(post[name]),tz=None)) - else: - row.append(None) - elif name == 'edited': - val = post[name] - if type(val) == bool: - row.append(val) - row.append(None) - else: - row.append(True) - row.append(datetime.fromtimestamp(int(val),tz=None)) - elif name == "time_edited": - continue - elif name == 'has_media': - row.append(post.get('media',None) is not None) - - elif name not in post: - row.append(None) - else: - row.append(post[name]) - return tuple(row) - -pool = Pool(28) - -stream = open_fileset(files) - -N = 100000 - -rows = pool.imap_unordered(parse_submission, stream, chunksize=int(N/28)) - -from itertools import islice -import pandas as pd -import pyarrow as pa -import pyarrow.parquet as pq - -schema = pa.schema([ - pa.field('id', pa.string(),nullable=True), - pa.field('author', pa.string(),nullable=True), - pa.field('subreddit', pa.string(),nullable=True), - pa.field('title', pa.string(),nullable=True), - pa.field('created_utc', pa.timestamp('ms'),nullable=True), - pa.field('permalink', pa.string(),nullable=True), - pa.field('url', pa.string(),nullable=True), - pa.field('domain', pa.string(),nullable=True), - pa.field('score', pa.int64(),nullable=True), - pa.field('ups', pa.int64(),nullable=True), - pa.field('downs', pa.int64(),nullable=True), - pa.field('over_18', pa.bool_(),nullable=True), - pa.field('has_media',pa.bool_(),nullable=True), - pa.field('selftext',pa.string(),nullable=True), - pa.field('retrieved_on', pa.timestamp('ms'),nullable=True), - pa.field('num_comments', pa.int64(),nullable=True), - pa.field('gilded',pa.int64(),nullable=True), - pa.field('edited',pa.bool_(),nullable=True), - pa.field('time_edited',pa.timestamp('ms'),nullable=True), - pa.field('subreddit_type',pa.string(),nullable=True), - pa.field('subreddit_id',pa.string(),nullable=True), - pa.field('subreddit_subscribers',pa.int64(),nullable=True), - pa.field('name',pa.string(),nullable=True), - pa.field('is_self',pa.bool_(),nullable=True), - pa.field('stickied',pa.bool_(),nullable=True), - pa.field('is_submitter',pa.bool_(),nullable=True), - pa.field('quarantine',pa.bool_(),nullable=True), - pa.field('error',pa.string(),nullable=True)]) - -with pq.ParquetWriter("/gscratch/comdata/output/reddit_submissions.parquet_temp",schema=schema,compression='snappy',flavor='spark') as writer: - while True: - chunk = islice(rows,N) - pddf = pd.DataFrame(chunk, columns=schema.names) - table = pa.Table.from_pandas(pddf,schema=schema) - if table.shape[0] == 0: - break - writer.write_table(table) - - writer.close() -