Source code for langchain_community.docstore.wikipedia
"""封装了维基百科API。"""
from typing import Union
from langchain_core.documents import Document
from langchain_community.docstore.base import Docstore
[docs]class Wikipedia(Docstore):
"""维基百科 API。"""
[docs] def __init__(self) -> None:
"""检查是否安装了wikipedia包。"""
try:
import wikipedia # noqa: F401
except ImportError:
raise ImportError(
"Could not import wikipedia python package. "
"Please install it with `pip install wikipedia`."
)
[docs] def search(self, search: str) -> Union[str, Document]:
"""尝试搜索维基页面。
如果页面存在,则返回页面摘要和一个PageWithLookups对象。
如果页面不存在,则返回类似条目。
参数:
search:搜索字符串。
返回:一个文档对象或错误消息。
"""
import wikipedia
try:
page_content = wikipedia.page(search).content
url = wikipedia.page(search).url
result: Union[str, Document] = Document(
page_content=page_content, metadata={"page": url}
)
except wikipedia.PageError:
result = f"Could not find [{search}]. Similar: {wikipedia.search(search)}"
except wikipedia.DisambiguationError:
result = f"Could not find [{search}]. Similar: {wikipedia.search(search)}"
return result