Unverified50% confidenceSolutionExact time
对于尚未升级到 Python 3.15 的项目，仍可使用经典的 object() 哨兵方案，其语义与官方实现一致
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
8/13/2026
First Seen
Valid until: 11/11/2026
Sources
Related Claims
UnverifiedPEP 661 在 Python 3.15 中引入了标准化的哨兵对象模式76% similarVerifiedPython 3.5 introduced Type Hints, which do not affect runtime behavior and can be used with static checking tools such as mypy to catch type errors during development.69% similarUnverifiedPython 标准库的 dataclasses 模块使用 MISSING 哨兵，functools.reduce 内部实现也使用类似的哨兵机制69% similarUnverifiedPython 3.14 introduces a new t-string (template string) feature, supporting lazy evaluation, custom processing, and security checks.67% similarVerifiedPython 3.13 has begun introducing an optional GIL-free mode (Free-threaded Python).66% similar
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