from.geojsonnomapthanks

{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "geometry": {
        "type": "Polygon",
        "coordinates": [
          [
            [
              -3.1640625,
              53.014783245859235
            ],
            [
              -3.1640625,
              51.86292391360244
            ],
            [
              -0.50537109375,
              51.385495069223204
            ],
            [
              1.16455078125,
              52.38901106223456
            ],
            [
              -0.41748046875,
              53.91728101547621
            ],
            [
              -2.109375,
              53.85252660044951
            ],
            [
              -3.1640625,
              53.014783245859235
            ]
          ]
        ]
      },
      "properties": {
        "name": "Ho god, sounds like a polygouine"
      }
    },
    {
      "type": "Feature",
      "geometry": {
        "type": "LineString",
        "coordinates": [
          [
            1.8017578124999998,
            51.16556659836182
          ],
          [
            -0.48339843749999994,
            49.710272582105695
          ],
          [
            -2.2412109375,
            49.460983851109454
          ],
          [
            -3.1640625,
            50.0923932109388
          ],
          [
            -5.60302734375,
            51.998410382390325
          ]
        ]
      },
      "properties": {
        "name": "Light line"
      }
    },
    {
      "type": "Feature",
      "geometry": {
        "type": "Point",
        "coordinates": [
          -0.24169921874999997,
          50.84757295365389
        ]
      },
      "properties": {
        "_storage_options": {
          "iconUrl": "/uploads/pictogram/airfield-24-white.png",
          "showLabel": true,
          "iconClass": "Ball",
          "color": "OliveDrab"
        },
        "description": "<blockquote class=\"twitter-tweet\" lang=\"en\"><p>When streets Speak their Secrets! <a href=\"http://t.co/3899IeOiR8\">pic.twitter.com/3899IeOiR8</a></p>&mdash; Digital Parcoursdescription han\n sdfdfsf\n{{http://www.submarine.gg/image.jpg}}",
        "name": "pouet en live mon pote"
      }
    }
  ]
}

geoflatjson.py

#!/usr/bin/env python
"""geoflatjson

Usage:
  geoflatjson.py toflat <filepath>

Options:
  -h --help     Show this screen.
  --version     Show version.

"""
import simplejson
from docopt import docopt


if __name__ == '__main__':
    args = docopt(__doc__, version='geoflatjson 0.1')
    if args['<filepath>']:
        with open(args['<filepath>'], encoding='utf-8') as a_file:
            g = simplejson.loads(a_file.read())
            final = {
                "type": [],
                "coordinates": [],
            }
            for idx, f in enumerate(g['features']):
                final['_type'].append(f['geometry']['type'])
                final['_coordinates'].append(f['geometry']['coordinates'])
                for key, value in f['properties'].items():
                    if not key in final:
                        final[key] = [''] * idx
                    final[key].append(value)
            print(final)

to.flatjson

{
    "_type": ["Polygon", "LineString", "Point"],
    "_coordinates": [[[[-3.1640625, 53.014783245859235], [-3.1640625, 51.86292391360244], [-0.50537109375, 51.385495069223204], [1.16455078125, 52.38901106223456], [-0.41748046875, 53.91728101547621], [-2.109375, 53.85252660044951], [-3.1640625, 53.014783245859235]]], [[1.8017578124999998, 51.16556659836182], [-0.48339843749999994, 49.710272582105695], [-2.2412109375, 49.460983851109454], [-3.1640625, 50.0923932109388], [-5.60302734375, 51.998410382390325]], [-0.24169921874999997, 50.84757295365389]],
    "description": ["", "", "<blockquote class=\"twitter-tweet\" lang=\"en\"><p>When streets Speak their Secrets! <a href=\"http://t.co/3899IeOiR8\">pic.twitter.com/3899IeOiR8</a></p>&mdash; Digital Parcoursdescription han\n sdfdfsf\n{{http://www.submarine.gg/image.jpg}}"],
    "name": ["Ho god, sounds like a polygouine", "Light line", "pouet en live mon pote"],
    "_storage_options": ["", "", {"color": "OliveDrab", "iconUrl": "/uploads/pictogram/airfield-24-white.png", "iconClass": "Ball", "showLabel": true}]}