How to access particular JSON data in this case?

How to access particular JSON data in this case?

I know i can retrieve total units like this in python using simplejson.
jsondata = json.loads(r.text)
jsondata['data']['total_units']
But how do i go on and fetch data of status field?
{
status: 'ok',
data: {
total_units: 1,
unit_info: [{
type: 'car',
status: 'Blue car',
id: '20513'
}]
}
}