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37 lines
868 B
Python
37 lines
868 B
Python
"""
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媒体 Chain 的惰性稳定公开入口。
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"""
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from importlib import import_module
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from typing import TYPE_CHECKING, Any
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if TYPE_CHECKING:
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from app.chain.media.facade import MediaChain
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_EXPORTS = {
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"MediaChain": ("app.chain.media.facade", "MediaChain"),
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}
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def __getattr__(name: str) -> Any:
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"""
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首次访问时解析稳定 MediaChain 类型，兼容符号仍由 Compat overlay 提供。
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"""
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contract = _EXPORTS.get(name)
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if contract is None:
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raise AttributeError(f"module {__name__!r} has no attribute {name!r}")
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module_name, symbol_name = contract
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value = getattr(import_module(module_name), symbol_name)
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globals()[name] = value
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return value
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def __dir__() -> list[str]:
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"""
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向交互式工具暴露稳定公开面。
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"""
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return sorted({*globals(), *_EXPORTS})
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__all__ = ["MediaChain"]
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