File size: 2,287 Bytes
12c201b | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 | #!/usr/bin/env python3
"""Randomly sample entries from a JSON list."""
import argparse
import json
import os
import random
import sys
"""
python sample_data/sample_json.py \
--input outputs/results_filter_data_test.json \
--num 10000 \
--output sample_data/sampled_data_1.json
python sample_data/sample_json.py \
--input outputs/results_filter_data_test_humo.json \
--num 10000 \
--output sample_data/sampled_data_2.json
python sample_data/sample_json.py \
--input outputs/results_filter_data_test_mismatched.json \
--num 10000 \
--output sample_data/sampled_data_3.json
"""
def parse_args() -> argparse.Namespace:
parser = argparse.ArgumentParser(
description="Randomly sample N items from a JSON list and save to a new file.",
)
parser.add_argument(
"--input",
default="outputs/results_filter_data_test.json",
help="Input JSON path (default: outputs/results_filter_data_test.json)",
)
parser.add_argument(
"--output",
required=True,
help="Output JSON path for the sampled items",
)
parser.add_argument(
"--num",
type=int,
required=True,
help="Number of items to sample",
)
parser.add_argument(
"--seed",
type=int,
default=42,
help="Random seed (default: 42)",
)
return parser.parse_args()
def main() -> int:
args = parse_args()
if args.num <= 0:
print("--num must be a positive integer", file=sys.stderr)
return 2
with open(args.input, "r", encoding="utf-8") as f:
data = json.load(f)
if not isinstance(data, list):
print("Input JSON must be a list", file=sys.stderr)
return 2
total = len(data)
if args.num > total:
print(f"Requested {args.num} items, but only {total} available", file=sys.stderr)
return 2
random.seed(args.seed)
sampled = random.sample(data, args.num)
os.makedirs(os.path.dirname(args.output) or ".", exist_ok=True)
with open(args.output, "w", encoding="utf-8") as f:
json.dump(sampled, f, ensure_ascii=False, indent=2)
print(f"Saved {len(sampled)} items to {args.output}")
return 0
if __name__ == "__main__":
raise SystemExit(main())
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