There are several efforts of vendor neutral libraries such as Netmiko (https://github.com/ktbyers/netmiko) and napalm (https://github.com/napalm-automation/napalm). Because these libraries do not come natively from the device vendor, they are sometimes a step slower to support the latest platform or features. They are also community supported, which means they are not necessarily the ideal fit if you need to rely on somebody else to fix bugs without any measure of service level commitment.