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feat: retry/backoff module (commons v0.2.0)

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add commons.retry: exponential-backoff retry as sync `retry` and async `aretry`,
each usable as a call form or a decorator. backoff is min(backoff*factor**n,
max_backoff) with optional full jitter; the schedule is a pure generator so it
tests without real sleeps (sleep + rand injectable). `on=` narrows retryable
exception types, `give_up(exc)` stops early on a non-retryable error, and after
attempts are exhausted the LAST exception is re-raised (fail loud, never swallowed).

de-dups retry logic written 3x divergently (aiowebhooks 429/5xx, aioproxies
burn/rotate, aiomail reconnect).

Signed-off-by: disqualifier <dev@disqualifier.me>
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dsql
2026-06-27 21:33:55 -04:00
parent 7437e1feb0
commit 0939917172
4 changed files with 205 additions and 5 deletions
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pyproject.toml
+2 -2
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@@ -4,8 +4,8 @@ build-backend = "hatchling.build"
[project]
name = "commons"
version = "0.1.0"
description = "small stdlib-only sync helpers: time/timezone deltas, dotted-path dict access, display masking, and ip/address tooling"
version = "0.2.0"
description = "small stdlib-only sync helpers: time/timezone deltas, dotted-path dict access, display masking, ip/address tooling, and retry/backoff"
requires-python = ">=3.10"
dependencies = []