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#!/usr/bin/env python """Bits and bytes related humanization.""" from __future__ import annotations suffixes = { "decimal": (" kB", " MB", " GB", " TB", " PB", " EB", " ZB", " YB"), "binary": (" KiB", " MiB", " GiB", " TiB", " PiB", " EiB", " ZiB", " YiB"), "gnu": "KMGTPEZY", } def naturalsize( value: float | str, binary: bool = False, gnu: bool = False, format: str = "%.1f", ) -> str: """Format a number of bytes like a human readable filesize (e.g. 10 kB). By default, decimal suffixes (kB, MB) are used. Non-GNU modes are compatible with jinja2's `filesizeformat` filter. Examples: ```pycon >>> naturalsize(3000000) '3.0 MB' >>> naturalsize(300, False, True) '300B' >>> naturalsize(3000, False, True) '2.9K' >>> naturalsize(3000, False, True, "%.3f") '2.930K' >>> naturalsize(3000, True) '2.9 KiB' >>> naturalsize(10**28) '10000.0 YB' >>> naturalsize(-4096, True) '-4.0 KiB' ``` Args: value (int, float, str): Integer to convert. binary (bool): If `True`, uses binary suffixes (KiB, MiB) with base 2<sup>10</sup> instead of 10<sup>3</sup>. gnu (bool): If `True`, the binary argument is ignored and GNU-style (`ls -sh` style) prefixes are used (K, M) with the 2**10 definition. format (str): Custom formatter. Returns: str: Human readable representation of a filesize. """ if gnu: suffix = suffixes["gnu"] elif binary: suffix = suffixes["binary"] else: suffix = suffixes["decimal"] base = 1024 if (gnu or binary) else 1000 bytes_ = float(value) abs_bytes = abs(bytes_) if abs_bytes == 1 and not gnu: return "%d Byte" % bytes_ if abs_bytes < base and not gnu: return "%d Bytes" % bytes_ if abs_bytes < base and gnu: return "%dB" % bytes_ for i, s in enumerate(suffix): unit = base ** (i + 2) if abs_bytes < unit: break ret: str = format % (base * bytes_ / unit) + s return ret