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beugley/human_readable_to_bytes.py

Created August 24, 2016 17:51
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Python function to convert a human-readable byte string (e.g. 2G, 10GB, 30MB, 20KB) to a number of bytes
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human_readable_to_bytes.py
def human_readable_to_bytes(size):
"""Given a human-readable byte string (e.g. 2G, 10GB, 30MB, 20KB),
return the number of bytes. Will return 0 if the argument has
unexpected form.
"""
if (size[-1] == 'B'):
size = size[:-1]
if (size.isdigit()):
bytes = int(size)
else:
bytes = size[:-1]
unit = size[-1]
if (bytes.isdigit()):
bytes = int(bytes)
if (unit == 'G'):
bytes *= 1073741824
elif (unit == 'M'):
bytes *= 1048576
elif (unit == 'K'):
bytes *= 1024
else:
bytes = 0
else:
bytes = 0
return bytes,size+'B'
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