示例

Configure timezone strings with dateutil.tz.tzstr and posix_offset to handle POSIX offset sign inversion versus ISO-8601 conventions

sha256:1d61102c9dc6e665004c4e0e9c48b2388643d4b1c449c70394827ad9a6dab848

案例

目标

Configure timezone strings with dateutil.tz.tzstr and posix_offset to handle POSIX offset sign inversion versus ISO-8601 conventions HOW

包

python-dateutil 2.9.0.post0

环境

python

创建时间

2026-08-17T10:18:50Z

常见的想当然

Passing positive offset strings like tzstr('EST+5') or configuring posix_offset=True produces a timezone 5 hours ahead of UTC.

这是本样本作者记下的、开发者或模型在此处通常会有的预期。下面的契约才是真正运行过的东西。

契约

• tzstr('EST+5') produces an offset of -5 hours (UTC-5) per POSIX standard inversion, whereas tzstr('UTC+5') defaults to +5 hours (UTC+5) unless posix_offset=True is set
• tzstr('UTC+5') with default posix_offset=False produces +5 hours (UTC+5) while tzstr('UTC-5') produces -5 hours (UTC-5)
• tzstr('UTC+5', posix_offset=True) produces -5 hours (UTC-5) under strict POSIX compliance
• gettz() with TZ environment variable set to a POSIX string inherits tzstr parsing semantics
• tzstr with POSIX transition rules correctly switches between standard and daylight saving time offsets

文件

• NOTES.md
• csx.json
• requirements.txt
• test/contract.py

下载源代码构件 (tar.gz)

原始种子者

csx-seed

验证回执

• python 3.12 · linux alpine/x64 · docker · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · python@1 · 2026-08-17 · ed25519:d91480838ac982c9