Comment 1 for bug 1674213

In most scenario "-f json" output format is used for machine readable, the program or shell consume the result, not read it directly in console for human, the use case like:

python
subprocess.Popen("openstack server list -f json")
Note: See openstackclient functional tests, it's a good reference for "-f json"

or
bash
#openstack server list -f json > output.json