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tgardiner/calc_etag.py

Last active January 13, 2019 02:54
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Calculate AWS S3 Etag for local file
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calc_etag.py
def calc_etag(inputfile, partsize):
md5_digests = []
with open(inputfile, 'rb') as f:
for chunk in iter(lambda: f.read(partsize), b''):
md5_digests.append(md5(chunk).digest())
return md5(b''.join(md5_digests)).hexdigest() + '-' + str(len(md5_digests))
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