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cc6274a | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 | """ModelSource ABC — HF and ModelScope implement this."""
from __future__ import annotations
from abc import ABC, abstractmethod
from dataclasses import dataclass
from typing import Any
@dataclass(frozen=True)
class SiblingFile:
"""One file in the model repo. `size` is bytes, or None if unknown."""
filename: str
size: int | None
@dataclass(frozen=True)
class ModelArtifact:
"""The raw material a ModelSource returns.
We do NOT interpret anything here — interpretation lives in `architecture/`
and `weight_analyzer/`. This is the thin "fetch" layer.
"""
source: str # "huggingface" | "modelscope"
model_id: str
commit_sha: str | None # HF provides this; used as cache key component
config: dict[str, Any] # parsed config.json
siblings: tuple[SiblingFile, ...] # all files in the repo
class ModelNotFoundError(Exception):
"""Model id does not exist on this source."""
class AuthRequiredError(Exception):
"""Model is gated / private — user must set a token."""
class SourceUnavailableError(Exception):
"""Network error, timeout, rate limit, etc."""
class ModelSource(ABC):
"""Abstract interface for HF / ModelScope / future sources."""
name: str # subclasses override
@abstractmethod
def fetch(self, model_id: str) -> ModelArtifact:
"""Fetch config.json + siblings for the given model.
Raises:
ModelNotFoundError: 404.
AuthRequiredError: 401/403 (gated/private).
SourceUnavailableError: 429, 5xx, timeout, network down.
"""
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