__ossh_known_hosts(){
    if [[ -f ~/.ansible/tmp/multi_ec2_inventory.cache ]]; then
      /usr/bin/python -c 'import json,os; z = json.loads(open("%s"%os.path.expanduser("~/.ansible/tmp/multi_ec2_inventory.cache")).read()); print "\n".join(["%s.%s" % (host["ec2_tag_Name"],host["ec2_tag_environment"]) for dns, host in z["_meta"]["hostvars"].items()])'
    fi
}

_ossh()
{
    local cur prev known_hosts
    COMPREPLY=()
    cur="${COMP_WORDS[COMP_CWORD]}"
    prev="${COMP_WORDS[COMP_CWORD-1]}"
    known_hosts="$(__ossh_known_hosts)"
    COMPREPLY=( $(compgen -W "${known_hosts}" -- ${cur}))

    return 0
}
complete -F _ossh ossh oscp