This patch adds support for 2 hash commands HDEL and HGETALL. Internally it introduces the hashes_result_builder class to read hashes and stored them in a std::map. Other changes: - one exception return string was fixed - tests now use pytest.raises Signed-off-by: Etienne Adam <etienne.adam@gmail.com> Message-Id: <20200907202528.4985-1-etienne.adam@gmail.com>