Toggle Menu
Prev Up Next

# 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

    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.
        """

        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

        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(
                lang=self.lang,
                top_k_results=self.load_max_docs,
                load_all_available_meta=self.load_all_available_meta,
                doc_content_chars_max=self.doc_content_chars_max,
            )
            yield from client.load(self.query)