ConnectionPool
===============

.. code-block:: python
   :caption: basic.py
   :linenos:

   import asyncio
   import typing

   from zcached.asyncio import AsyncZCached, AsyncConnectionPool, AsyncConnection
   from zcached import Result


   async def main():
       connection_pool = AsyncConnectionPool(
           # Connections in the pool. If we do not send a large number of requests, we can use only one.
           pool_size=1,
           # Some function that does not take any arguments, but returns the created connection.
           connection_factory=lambda: AsyncConnection(host="127.0.0.1", port=7556),
       )

       client: AsyncZCached = AsyncZCached.from_connection_pool(connection_pool)
       await client.run()

       response: Result[typing.List[str]] = await client.keys()
       if response.error:
           raise RuntimeError(response.error)

       print(response.value)


   if __name__ == "__main__":
       asyncio.run(main())