mirror of
https://github.com/kennethreitz/dive-into-python3.git
synced 2026-06-05 23:10:17 +00:00
Mark Pilgrim
40 lines
1.1 KiB
Python
40 lines
1.1 KiB
Python
"""Convert file sizes to human-readable form.
|
|
|
|
Available functions:
|
|
human_size(size, a_kilobyte_is_1024_bytes)
|
|
takes a file size and returns a human-readable string
|
|
|
|
Examples:
|
|
>>> human_size(1024)
|
|
'1.0 KiB'
|
|
>>> human_size(1000, False)
|
|
'1.0 KB'
|
|
"""
|
|
|
|
SUFFIXES = {1000: ('KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'),
|
|
1024: ('KiB', 'MiB', 'GiB', 'TiB', 'PiB', 'EiB', 'ZiB', 'YiB')}
|
|
|
|
def human_size(size, a_kilobyte_is_1024_bytes=True):
|
|
"""Convert a file size to human-readable form.
|
|
|
|
Keyword arguments:
|
|
size -- file size in bytes
|
|
a_kilobyte_is_1024_bytes -- if True (default), use multiples of 1024
|
|
if False, use multiples of 1000
|
|
|
|
Returns: string
|
|
|
|
"""
|
|
if size < 0:
|
|
raise ValueError('number must be non-negative')
|
|
multiple = 1024 if a_kilobyte_is_1024_bytes else 1000
|
|
for suffix in SUFFIXES[multiple]:
|
|
size /= multiple
|
|
if size < multiple:
|
|
return "{0:.1f} {1}".format(size, suffix)
|
|
raise ValueError('number too large')
|
|
|
|
if __name__ == "__main__":
|
|
print(human_size(1000000000000, False))
|
|
print(human_size(1000000000000))
|