can't get Developing Dynamic Inventory working as expected...

Having an modified python script generating following json string while --list. but get some error message from ansible. not sure what went wrong…

ERROR: failed to parse: {‘test’: [‘jzk.simpletest.com.’, ‘test.simpletest.com.’]}
{
“test”: [
jzk.simpletest.com.”,
test.simpletest.com.”
]
}

my bad. I left some stupid debug statement in the script. case closed. LOL