Source code for langchain_community.document_loaders.wikipedia

from typing import Iterator, Optional

from langchain_core.documents import Document

from langchain_community.document_loaders.base import BaseLoader
from langchain_community.utilities.wikipedia import WikipediaAPIWrapper

[docs]class WikipediaLoader(BaseLoader): """Load from `Wikipedia`. The hard limit on the length of the query is 300 for now. Each wiki page represents one Document. """
[docs] def __init__( self, query: str, lang: str = "en", load_max_docs: Optional[int] = 25, load_all_available_meta: Optional[bool] = False, doc_content_chars_max: Optional[int] = 4000, ): """ Initializes a new instance of the WikipediaLoader class. Args: query (str): The query string to search on Wikipedia. lang (str, optional): The language code for the Wikipedia language edition. Defaults to "en". load_max_docs (int, optional): The maximum number of documents to load. Defaults to 100. load_all_available_meta (bool, optional): Indicates whether to load all available metadata for each document. Defaults to False. doc_content_chars_max (int, optional): The maximum number of characters for the document content. Defaults to 4000. """ self.query = query self.lang = lang self.load_max_docs = load_max_docs self.load_all_available_meta = load_all_available_meta self.doc_content_chars_max = doc_content_chars_max
[docs] def lazy_load(self) -> Iterator[Document]: """ Loads the query result from Wikipedia into a list of Documents. Returns: A list of Document objects representing the loaded Wikipedia pages. """ client = WikipediaAPIWrapper( # type: ignore[call-arg] lang=self.lang, top_k_results=self.load_max_docs, # type: ignore[arg-type] load_all_available_meta=self.load_all_available_meta, # type: ignore[arg-type] doc_content_chars_max=self.doc_content_chars_max, # type: ignore[arg-type] ) yield from client.load(self.query)