19 lines
576 B
Python
19 lines
576 B
Python
"""UUIDv7（36 字符形式），兼容 Python 3.10。"""
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from __future__ import annotations
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import os
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import time
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import uuid
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def new_uuid7() -> str:
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if hasattr(uuid, "uuid7"):
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return str(uuid.uuid7()) # type: ignore[attr-defined]
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# RFC 9562 简化实现
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ts_ms = int(time.time() * 1000) & ((1 << 48) - 1)
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rand_a = int.from_bytes(os.urandom(2), "big") & 0x0FFF
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rand_b = int.from_bytes(os.urandom(8), "big") & ((1 << 62) - 1)
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value = (ts_ms << 80) | (0x7 << 76) | (rand_a << 64) | (0b10 << 62) | rand_b
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return str(uuid.UUID(int=value))
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