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72 lines
2.1 KiB
Python
72 lines
2.1 KiB
Python
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#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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"""Bits and 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 bytes like a human readable filesize (e.g. 10 kB).
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By default, decimal suffixes (kB, MB) are used.
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Non-GNU modes are compatible with jinja2's `filesizeformat` filter.
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Examples:
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```pycon
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>>> naturalsize(3000000)
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'3.0 MB'
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>>> naturalsize(300, False, True)
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'300B'
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>>> naturalsize(3000, False, True)
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'2.9K'
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>>> naturalsize(3000, False, True, "%.3f")
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'2.930K'
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>>> naturalsize(3000, True)
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'2.9 KiB'
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```
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Args:
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value (int, float, str): Integer to convert.
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binary (bool): If `True`, uses binary suffixes (KiB, MiB) with base
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2<sup>10</sup> instead of 10<sup>3</sup>.
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gnu (bool): If `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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format (str): Custom formatter.
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Returns:
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str: Human readable representation of a filesize.
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"""
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if gnu:
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suffix = suffixes["gnu"]
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elif binary:
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suffix = suffixes["binary"]
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else:
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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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abs_bytes = abs(bytes)
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if abs_bytes == 1 and not gnu:
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return "%d Byte" % bytes
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elif abs_bytes < base and not gnu:
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return "%d Bytes" % bytes
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elif abs_bytes < base and gnu:
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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 abs_bytes < unit and not gnu:
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return (format + " %s") % ((base * bytes / unit), s)
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elif abs_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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