git clone https://github.com/beyondwords/json2csv.git
cd json2csv
pip install -r requirements.txt

python json2csv.py /path/to/json_file.json /path/to/outline_file.json

python json2csv.py /path/to/json_file.json /path/to/outline_file.json -o /some/other/file.csv

{
  "nodes": [
    {"source": {"author": "Someone"}, "message": {"original": "Hey!", "Revised": "Hey yo!"}},
    {"source": {"author": "Another"}, "message": {"original": "Howdy!", "Revised": "Howdy partner!"}},
    {"source": {"author": "Me too"}, "message": {"original": "Yo!", "Revised": "Yo, 'sup?"}}
  ]
}

{
  "map": [
    ["author", "source.author"],
    ["message", "message.original"]
  ],
  "collection": "nodes"
}