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Try to fix mypy issue with calculate_md5 #6493

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Aug 25, 2022
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Try to fix mypy issue with calculate_md5 #6493

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5 changes: 4 additions & 1 deletion torchvision/datasets/utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -65,7 +65,10 @@ def calculate_md5(fpath: str, chunk_size: int = 1024 * 1024) -> str:
# Setting the `usedforsecurity` flag does not change anything about the functionality, but indicates that we are
# not using the MD5 checksum for cryptography. This enables its usage in restricted environments like FIPS. Without
# it torchvision.datasets is unusable in these environments since we perform a MD5 check everywhere.
md5 = hashlib.md5(**dict(usedforsecurity=False) if sys.version_info >= (3, 9) else dict())
if sys.version_info >= (3, 9):
md5 = hashlib.md5(usedforsecurity=False)
else:
md5 = hashlib.md5()
with open(fpath, "rb") as f:
for chunk in iter(lambda: f.read(chunk_size), b""):
md5.update(chunk)
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