// This file is autogenerated, DO NOT EDIT
// transform/examples.asciidoc:129

[source, python]
----
resp = client.transform.preview_transform(
    source={
        "index": "kibana_sample_data_flights",
        "query": {
            "bool": {
                "filter": [
                    {
                        "term": {
                            "Cancelled": False
                        }
                    }
                ]
            }
        }
    },
    dest={
        "index": "sample_flight_delays_by_carrier"
    },
    pivot={
        "group_by": {
            "carrier": {
                "terms": {
                    "field": "Carrier"
                }
            }
        },
        "aggregations": {
            "flights_count": {
                "value_count": {
                    "field": "FlightNum"
                }
            },
            "delay_mins_total": {
                "sum": {
                    "field": "FlightDelayMin"
                }
            },
            "flight_mins_total": {
                "sum": {
                    "field": "FlightTimeMin"
                }
            },
            "delay_time_percentage": {
                "bucket_script": {
                    "buckets_path": {
                        "delay_time": "delay_mins_total.value",
                        "flight_time": "flight_mins_total.value"
                    },
                    "script": "(params.delay_time / params.flight_time) * 100"
                }
            }
        }
    },
)
print(resp)
----
