Initial commit

scripts/single_file.py

@@ -0,0 +1,55 @@
+import zstandard
+import os
+import json
+import sys
+from datetime import datetime
+import logging.handlers
+
+
+log = logging.getLogger("bot")
+log.setLevel(logging.DEBUG)
+log.addHandler(logging.StreamHandler())
+
+
+def read_lines_zst(file_name):
+	with open(file_name, 'rb') as file_handle:
+		buffer = ''
+		reader = zstandard.ZstdDecompressor(max_window_size=2**31).stream_reader(file_handle)
+		while True:
+			chunk = reader.read(2**27).decode()
+			if not chunk:
+				break
+			lines = (buffer + chunk).split("\n")
+
+			for line in lines[:-1]:
+				yield line, file_handle.tell()
+
+			buffer = lines[-1]
+		reader.close()
+
+
+if __name__ == "__main__":
+	file_path = r"\\MYCLOUDPR4100\Public\reddit\submissions\RS_2013-03.zst"
+	file_size = os.stat(file_path).st_size
+	file_lines = 0
+	file_bytes_processed = 0
+	created = None
+	field = "subreddit"
+	value = "wallstreetbets"
+	bad_lines = 0
+	try:
+		for line, file_bytes_processed in read_lines_zst(file_path):
+			try:
+				obj = json.loads(line)
+				created = datetime.utcfromtimestamp(int(obj['created_utc']))
+				temp = obj[field] == value
+			except (KeyError, json.JSONDecodeError) as err:
+				bad_lines += 1
+			file_lines += 1
+			if file_lines % 100000 == 0:
+				log.info(f"{created.strftime('%Y-%m-%d %H:%M:%S')} : {file_lines:,} : {bad_lines:,} : {(file_bytes_processed / file_size) * 100:.0f}%")
+	except Exception as err:
+		log.info(err)
+
+	log.info(f"Complete : {file_lines:,} : {bad_lines:,}")
+