BenStullsBets
30 lines
834 B
Python
30 lines
834 B
Python
"""Stage 1 — the per-clip strict-PD provenance record (spec §3.1).
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Captured at source time so license + source + URL travel with the media. The
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'no explicit license -> assume PD, verify' trap (scales design §2.1) applies:
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"free stock" (Pexels/Pixabay) is NOT public domain.
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"""
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from __future__ import annotations
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from dataclasses import asdict, dataclass
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@dataclass(frozen=True)
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class Provenance:
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scale: str
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license: str
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source: str
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url: str
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fetched_at: str # ISO date; passed in (no clock here -> deterministic)
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def to_dict(self) -> dict:
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return asdict(self)
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@classmethod
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def from_dict(cls, d: dict) -> "Provenance":
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return cls(
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scale=d["scale"], license=d["license"], source=d["source"],
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url=d["url"], fetched_at=d["fetched_at"],
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)
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