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43 lines
1.2 KiB
Python
43 lines
1.2 KiB
Python
"""Base interface for loading large language models apis."""
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import json
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from pathlib import Path
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from typing import Union
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import yaml
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from langchain.llms import type_to_cls_dict
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from langchain.llms.base import BaseLLM
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def load_llm_from_config(config: dict) -> BaseLLM:
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"""Load LLM from Config Dict."""
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if "_type" not in config:
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raise ValueError("Must specify an LLM Type in config")
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config_type = config.pop("_type")
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if config_type not in type_to_cls_dict:
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raise ValueError(f"Loading {config_type} LLM not supported")
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llm_cls = type_to_cls_dict[config_type]
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return llm_cls(**config)
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def load_llm(file: Union[str, Path]) -> BaseLLM:
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"""Load LLM from file."""
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# Convert file to Path object.
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if isinstance(file, str):
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file_path = Path(file)
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else:
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file_path = file
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# Load from either json or yaml.
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if file_path.suffix == ".json":
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with open(file_path) as f:
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config = json.load(f)
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elif file_path.suffix == ".yaml":
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with open(file_path, "r") as f:
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config = yaml.safe_load(f)
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else:
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raise ValueError("File type must be json or yaml")
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# Load the LLM from the config now.
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return load_llm_from_config(config)
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