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rileymjohnson/hash_file.py

Created March 22, 2023 19:52
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Hash a file in Python using sha256 and memoryview
Raw
hash_file.py
from path import Pathlib
import hashlib
def hash_file(file: str | Path) -> str:
sha256 = hashlib.sha256()
file_mem_view = memoryview(
bytearray(128 * 1024)
)
with open(file, 'rb', buffering=0) as f:
while n := f.readinto(file_mem_view):
sha256.update(file_mem_view[:n])
return sha256.hexdigest()
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