Juju is a devops tool for automated deployments, with full stack service modelling and orchestration, in the cloud. Fully controllable with Python through “charms”. Do you deploy your Python services to Amazon EC2, or to Openstack, or even to HP cloud, joyent or Azure? Do you want to - without being tied into any one of them? What about local full stack deployments with lxc or kvm containers? Even if you’re convinced you don’t need “the cloud” because you manage your own servers, amazing technologies like Private clouds and MaaS, for dynamic server management on bare metal, may change your mind.