40 lines
1.3 KiB
Python
40 lines
1.3 KiB
Python
"""Download CIFAR-10 JPEG mirror TEST images 0700–0999 for cat and dog (never used: a fresh final test set).
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Same source and commit as cats-dogs/prepare_jpeg.py. Existing files are skipped.
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usage: python3 fetch_more.py
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"""
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from concurrent.futures import ThreadPoolExecutor
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from pathlib import Path
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import time
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import urllib.request
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COMMIT = 'd7d05618061fe37d830fb0419063d113c575ccbc'
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BASE = f'https://raw.githubusercontent.com/YoongiKim/CIFAR-10-images/{COMMIT}'
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cache = Path('/home/int/run/cats-dogs/data/github-jpeg-cache')
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def load(item):
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label, index = item
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path = cache / f'test-{label}-{index:04d}.jpg'
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if path.exists():
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return 0
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for attempt in range(6):
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try:
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with urllib.request.urlopen(f'{BASE}/test/{label}/{index:04d}.jpg', timeout=30) as r:
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data = r.read()
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tmp = path.with_suffix('.part')
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tmp.write_bytes(data)
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tmp.rename(path)
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return 1
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except Exception:
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if attempt == 5:
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raise
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time.sleep(3 * (attempt + 1))
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items = [(label, i) for label in ('cat', 'dog') for i in range(700, 1000)]
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with ThreadPoolExecutor(max_workers=8) as pool:
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for n, _ in enumerate(pool.map(load, items)):
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if n % 500 == 0:
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print('done', n, flush=True)
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print('all', len(items), flush=True)
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