41 lines
1.5 KiB
Python
41 lines
1.5 KiB
Python
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#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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"""Bits & Bytes related humanization."""
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suffixes = {
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'decimal': ('kB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'),
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'binary': ('KiB', 'MiB', 'GiB', 'TiB', 'PiB', 'EiB', 'ZiB', 'YiB'),
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'gnu': "KMGTPEZY",
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}
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def naturalsize(value, binary=False, gnu=False, format='%.1f'):
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"""Format a number of byteslike a human readable filesize (eg. 10 kB). By
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default, decimal suffixes (kB, MB) are used. Passing binary=true will use
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binary suffixes (KiB, MiB) are used and the base will be 2**10 instead of
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10**3. If ``gnu`` is True, the binary argument is ignored and GNU-style
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(ls -sh style) prefixes are used (K, M) with the 2**10 definition.
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Non-gnu modes are compatible with jinja2's ``filesizeformat`` filter."""
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if gnu: suffix = suffixes['gnu']
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elif binary: suffix = suffixes['binary']
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else: suffix = suffixes['decimal']
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base = 1024 if (gnu or binary) else 1000
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bytes = float(value)
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if bytes == 1 and not gnu: return '1 Byte'
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elif bytes < base and not gnu: return '%d Bytes' % bytes
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elif bytes < base and gnu: return '%dB' % bytes
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for i,s in enumerate(suffix):
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unit = base ** (i+2)
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if bytes < unit and not gnu:
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return (format + ' %s') % ((base * bytes / unit), s)
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elif bytes < unit and gnu:
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return (format + '%s') % ((base * bytes / unit), s)
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if gnu:
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return (format + '%s') % ((base * bytes / unit), s)
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return (format + ' %s') % ((base * bytes / unit), s)
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