mirror of
https://github.com/Watchful1/PushshiftDumps.git
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66 lines
2.2 KiB
Python
66 lines
2.2 KiB
Python
# this is an example of iterating over all zst files in a single folder,
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# decompressing them and reading the created_utc field to make sure the files
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# are intact. It has no output other than the number of lines
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import zstandard
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import os
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import json
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import sys
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from datetime import datetime
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import logging.handlers
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log = logging.getLogger("bot")
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log.setLevel(logging.DEBUG)
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log.addHandler(logging.StreamHandler())
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def read_lines_zst(file_name):
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with open(file_name, 'rb') as file_handle:
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buffer = ''
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reader = zstandard.ZstdDecompressor(max_window_size=2**28).stream_reader(file_handle)
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while True:
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chunk = reader.read(2**24).decode() # read a 16mb chunk at a time. There are some really big comments
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if not chunk:
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break
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lines = (buffer + chunk).split("\n")
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for line in lines[:-1]:
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yield line, file_handle.tell()
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buffer = lines[-1]
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reader.close()
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input_folder = sys.argv[1]
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input_files = []
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total_size = 0
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for subdir, dirs, files in os.walk(input_folder):
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for filename in files:
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input_path = os.path.join(subdir, filename)
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if input_path.endswith(".zst"):
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file_size = os.stat(input_path).st_size
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total_size += file_size
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input_files.append([input_path, file_size])
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log.info(f"Processing {len(input_files)} files of {(total_size / (2**30)):.2f} gigabytes")
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total_lines = 0
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total_bytes_processed = 0
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for input_file in input_files:
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file_lines = 0
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file_bytes_processed = 0
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created = None
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for line, file_bytes_processed in read_lines_zst(input_file[0]):
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obj = json.loads(line)
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created = datetime.utcfromtimestamp(int(obj['created_utc']))
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file_lines += 1
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if file_lines == 1:
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log.info(f"{created.strftime('%Y-%m-%d %H:%M:%S')} : {file_lines + total_lines:,} : 0% : {(total_bytes_processed / total_size) * 100:.0f}%")
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if file_lines % 100000 == 0:
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log.info(f"{created.strftime('%Y-%m-%d %H:%M:%S')} : {file_lines + total_lines:,} : {(file_bytes_processed / input_file[1]) * 100:.0f}% : {(total_bytes_processed / total_size) * 100:.0f}%")
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total_lines += file_lines
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total_bytes_processed += input_file[1]
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log.info(f"{created.strftime('%Y-%m-%d %H:%M:%S')} : {total_lines:,} : 100% : {(total_bytes_processed / total_size) * 100:.0f}%")
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log.info(f"Total: {total_lines}")
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