JSON to GeoJSON in Python

import json

def remap_linear_ring(linear_ring):
	return list(map(lambda c: [c['lng'], c['lat']], linear_ring))

def shapes_to_multipolygon(shapes):
	allRings = []
	for shape in shapes:
    	shell = remap_linear_ring(shape['shell'])
    	holes = list(map(lambda h:remap_linear_ring(h), shape['holes']))

    	rings = [shell]
    	rings.extend(holes)
    	allRings.append(rings)

	return {
    	'type': 'MultiPolygon',
    	'coordinates': allRings
	}


def response_to_geojson(response):
	response_data = json.loads(response)
	multi_polygons = list(map(lambda r: shapes_to_multipolygon(r['shapes']), response_data['results']))
	return {
    	'type': 'FeatureCollection',
    	'features': multi_polygons
	}