# Collection.ingest

```python
def Collection.ingest(
    data: IngestionData,
    allow_existing: bool = True,
    *,
    show_progress: bool | Callable[[float], None] = False,
) -> list[UUID]
```

Ingest data into a collection.

You need write permission on the collection to ingest data points.

## Parameters

**data**

`IngestionData`

The data to ingest.

Supported `IngestionData` data types are:

* An iterable of mappings, with one mapping per datapoint.
* A mapping from field names to ordered sequences, `numpy.ndarray` objects, or `pandas.Series` objects.
* A `pandas.DataFrame`, with column names mapped to dataset fields.
* An `xarray.Dataset`, with variables and coordinates mapped to dataset fields.

A mapping is always interpreted as column-oriented data. Wrap a single record in an iterable, such as `[record]`.
Every datapoint must include `time`. Tilebox generates `id` and `ingestion_time`. Missing optional values leave their corresponding fields unset.

**allow\_existing**

`bool`

Datapoint fields are used to generate a deterministic unique `UUID` for each
datapoint in a collection. Duplicate data points result in the same ID being generated.
If `allow_existing` is `True`, `ingest` will skip those data points, since they already exist.
If `allow_existing` is `False`, `ingest` will raise an error if any of the generated datapoint IDs already exist.
Defaults to `True`.

**show\_progress**

`bool | Callable[[float], None]`

If `True`, display a progress bar while ingesting many datapoints. You can also pass a callback to receive progress values between `0` and `1`. Defaults to `False`.

## Returns

List of datapoint IDs that were ingested, including the IDs of existing data points in case of duplicates and
`allow_existing=True`.

```python title="Python"
collection.ingest([
    {
        "time": "2023-05-01T12:00:00Z",
        "value": 1,
        "sensor": "A",
    },
    {
        "time": "2023-05-02T12:00:00Z",
        "value": 2,
        "sensor": "B",
    },
])
```

## Errors

**ArgumentError**

`found existing datapoints with same id`

If `allow_existing` is `False` and any of the datapoints attempting to ingest already exist.