codechu-fmt 0.2.0

Stdlib-only human-readable formatters — durations, rates, sizes.

   ┌──────────────────────────────────────────────────┐
   │  c o d e c h u — f m t                           │
   │  0.001s   1.5KB   42m07s   3.14MB/s   1h23m      │
   │  ·······raw numbers in, human strings out······· │
   └──────────────────────────────────────────────────┘

Precision formatters for durations, rates and byte sizes.

codechu-fmt

Stdlib-only human-readable formatters — durations, rates, and byte sizes — extracted from the Disk Cleaner toolchain. No external dependencies. Python 3.10+.

Install

pip install codechu-fmt

API

from codechu_fmt import format_duration, format_rate, format_size

format_duration(90)                       # → '1m 30s'
format_duration(90, compact=True)         # → '1m30s'
format_duration(0.5, compact=True)        # → '500ms'

format_rate(123.4)                        # → '123.4/s'
format_rate(1.5 * 1024**2, unit="bytes")  # → '1.5 MB/s'
format_rate(1500, unit="ops")             # → '1.5k ops/s'

format_size(1536)                         # → '1.5 KiB'   (binary, IEC)
format_size(1500, binary=False)           # → '1.5 kB'    (decimal, SI)

format_duration(seconds, *, compact=False)

Default form renders a human-friendly two-unit duration: 0.5s, 45.3s, 1m 30s, 1h 15m, 1d 5h, 2y 30d.

compact=True packs the same information into a tighter form suited for status lines: 500ms, 45s, 1m30s, 1h15m.

Negative values and NaN render as "?".

format_rate(units_per_sec, *, unit="items", precision=1)

• unit="items" (default) → 123.4/s
• unit="bytes" → IEC byte-rate, e.g. 1.5 MB/s
• unit="ops" → decimal-scaled, e.g. 2.5M ops/s
• any other label → 42.0 req/s-style suffix

format_size(num_bytes, *, binary=True, precision=1)

• binary=True (default) → IEC powers of 1024: KiB, MiB, GiB, …
• binary=False → SI powers of 1000: kB, MB, GB, …

Design

• Pure stdlib. Zero third-party dependencies. The whole library is three small modules.
• Predictable strings. Output is stable across platforms and locales — no thousand separators, no locale formatting.
• Defensive. Negative inputs and NaN never raise; they render as "?". Useful when the source is a noisy counter.

Tests

pip install -e ".[dev]"
pytest -q

Coverage gate: ≥90 %.

License

MIT — see LICENSE.