mirror of
https://github.com/Mintplex-Labs/langchain-python.git
synced 2026-07-21 08:45:22 -04:00
Leonid Ganeline
284d40b7af
Updated docstrings so, that [API Reference](https://api.python.langchain.com/en/latest/api_reference.html) page has text in the second column (class/function/... description.
80 lines
2.5 KiB
Python
80 lines
2.5 KiB
Python
import importlib
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import json
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import os
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from typing import Any, Dict, Optional
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from langchain.load.serializable import Serializable
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class Reviver:
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"""Reviver for JSON objects."""
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def __init__(self, secrets_map: Optional[Dict[str, str]] = None) -> None:
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self.secrets_map = secrets_map or dict()
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def __call__(self, value: Dict[str, Any]) -> Any:
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if (
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value.get("lc", None) == 1
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and value.get("type", None) == "secret"
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and value.get("id", None) is not None
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):
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[key] = value["id"]
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if key in self.secrets_map:
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return self.secrets_map[key]
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else:
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if key in os.environ and os.environ[key]:
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return os.environ[key]
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raise KeyError(f'Missing key "{key}" in load(secrets_map)')
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if (
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value.get("lc", None) == 1
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and value.get("type", None) == "not_implemented"
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and value.get("id", None) is not None
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):
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raise NotImplementedError(
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"Trying to load an object that doesn't implement "
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f"serialization: {value}"
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)
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if (
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value.get("lc", None) == 1
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and value.get("type", None) == "constructor"
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and value.get("id", None) is not None
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):
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[*namespace, name] = value["id"]
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# Currently, we only support langchain imports.
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if namespace[0] != "langchain":
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raise ValueError(f"Invalid namespace: {value}")
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# The root namespace "langchain" is not a valid identifier.
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if len(namespace) == 1:
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raise ValueError(f"Invalid namespace: {value}")
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mod = importlib.import_module(".".join(namespace))
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cls = getattr(mod, name)
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# The class must be a subclass of Serializable.
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if not issubclass(cls, Serializable):
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raise ValueError(f"Invalid namespace: {value}")
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# We don't need to recurse on kwargs
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# as json.loads will do that for us.
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kwargs = value.get("kwargs", dict())
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return cls(**kwargs)
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return value
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def loads(text: str, *, secrets_map: Optional[Dict[str, str]] = None) -> Any:
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"""Load a JSON object from a string.
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Args:
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text: The string to load.
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secrets_map: A map of secrets to load.
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Returns:
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"""
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return json.loads(text, object_hook=Reviver(secrets_map))
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