def __init__(self, host='<STR_LIT>', session=None, timeout=<NUM_LIT:3>):
if not session:<EOL><INDENT>session = requests.Session()<EOL><DEDENT>self.timeout = timeout<EOL>self.session = session<EOL>self.host = host<EOL>
Initialize the Nano (RaiBlocks) RPC client

:param host: location of the RPC server eg. http://localhost:7076
:type host: str

:param session: optional `requests` session to use for this client
:type host: :py:class:`requests.Session`