71 lines
2.3 KiB
Python
71 lines
2.3 KiB
Python
"""Struct store."""
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import re
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from typing import Any, Callable, Dict, Generic, Optional, Sequence, TypeVar
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from llama_index.data_structs.table import BaseStructTable
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from llama_index.indices.base import BaseIndex
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from llama_index.prompts import BasePromptTemplate
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from llama_index.prompts.default_prompts import DEFAULT_SCHEMA_EXTRACT_PROMPT
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from llama_index.schema import BaseNode
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from llama_index.service_context import ServiceContext
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from llama_index.storage.docstore.types import RefDocInfo
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BST = TypeVar("BST", bound=BaseStructTable)
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def default_output_parser(output: str) -> Optional[Dict[str, Any]]:
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"""Parse output of schema extraction.
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Attempt to parse the following format from the default prompt:
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field1: <value>, field2: <value>, ...
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"""
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tups = output.split("\n")
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fields = {}
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for tup in tups:
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if ":" in tup:
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tokens = tup.split(":")
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field = re.sub(r"\W+", "", tokens[0])
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value = re.sub(r"\W+", "", tokens[1])
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fields[field] = value
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return fields
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OUTPUT_PARSER_TYPE = Callable[[str], Optional[Dict[str, Any]]]
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class BaseStructStoreIndex(BaseIndex[BST], Generic[BST]):
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"""Base Struct Store Index."""
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def __init__(
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self,
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nodes: Optional[Sequence[BaseNode]] = None,
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index_struct: Optional[BST] = None,
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service_context: Optional[ServiceContext] = None,
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schema_extract_prompt: Optional[BasePromptTemplate] = None,
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output_parser: Optional[OUTPUT_PARSER_TYPE] = None,
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**kwargs: Any,
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) -> None:
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"""Initialize params."""
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self.schema_extract_prompt = (
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schema_extract_prompt or DEFAULT_SCHEMA_EXTRACT_PROMPT
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)
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self.output_parser = output_parser or default_output_parser
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super().__init__(
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nodes=nodes,
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index_struct=index_struct,
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service_context=service_context,
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**kwargs,
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)
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def _delete_node(self, node_id: str, **delete_kwargs: Any) -> None:
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"""Delete a node."""
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raise NotImplementedError("Delete not implemented for Struct Store Index.")
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@property
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def ref_doc_info(self) -> Dict[str, RefDocInfo]:
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"""Retrieve a dict mapping of ingested documents and their nodes+metadata."""
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raise NotImplementedError("Struct Store Index does not support ref_doc_info.")
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