Use dict.get() to look for specified names and print their value if present-CodePudding

I have a GeoJSON in below format:

{
    "type": "FeatureCollection",
    "features": [{
        "type": "Feature",
        "properties": {
            "uuid": "___",
            "type": "road",
            "length": "10m",
        },
        "geometry": {
            "type": "LineString",
            "coordinates": [
                [__________],
                [__________],
                [__________]
            ]
        }
    }]
}

I have written the below python script to try and read out the type of GeoJSON, known in this file as road.

def process_incoming_file(self, bucket, key, event):
    bulk_data = []

    try:
        obj = s3.get_object(Bucket=bucket, Key=key)
        decoded_content = json.loads(obj['Body'].read().decode('utf-8'))
        print(decoded_content)

        if decoded_content.get('type') == "FeatureCollection":

            for (idx, obj) in enumerate(decoded_content['features']):
                bulk_item = {}

                props = obj.get('properties')

                name = obj['properties'].get('name') or 'NULL'
                print(name)

                keys = [title.lower() for title in props]
                print('keys', keys)

                type = obj['properties'].get('type', 'road')
                print(obj['properties'].get('road'))

My issue is that in other GeoJSON files, type could be called something other than formofway.

How do I write a statement to look for different names it could come under, e.g.

type = obj['properties'].get('type', 'road', 'othername', 'something')

and if one of those names is present within the properties part of the GeoJSON then print its associated value? e.g. road.

CodePudding user response：

You could nest calls to get()

prop = obj['properties']
type = prop.get('type', prop.get('formofway', prop.get('othername', prop.get('something'))))

But this will get very deep if there are lots of possibilities. You can use a loop instead.

type_props = ['type', 'formofway', 'othername', 'something']
for prop in type_props:
    if prop in obj['properties']:
        type = obj['properties'][prop]
        break