# Wikipedia

>[Wikipedia](https://wikipedia.org/) is a multilingual free online encyclopedia written and maintained by a community of volunteers, known as Wikipedians, through open collaboration and using a wiki-based editing system called MediaWiki. `Wikipedia` is the largest and most-read reference work in history.


## Installation and Setup

```bash
pip install wikipedia
```



## Document Loader

See a [usage example](../modules/indexes/document_loaders/examples/wikipedia.ipynb).

```python
from langchain.document_loaders import WikipediaLoader
```

## Retriever

See a [usage example](../modules/indexes/retrievers/examples/wikipedia.ipynb).

```python
from langchain.retrievers import WikipediaRetriever
```