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# train(trainingData:parameters:sessionParameters:)

Begins an asynchronous hand action classifier’s training session.

```
static func train(trainingData: MLHandActionClassifier.DataSource, parameters: MLHandActionClassifier.ModelParameters = ModelParameters(), sessionParameters: MLTrainingSessionParameters = _defaultSessionParameters) throws -> MLJob<MLHandActionClassifier>
```

## Parameters

`trainingData`

An [`MLHandActionClassifier.DataSource`](/documentation/CreateML/MLHandActionClassifier/DataSource) instance.

`parameters`

An [`MLHandActionClassifier.ModelParameters`](/documentation/CreateML/MLHandActionClassifier/ModelParameters-swift.struct)
instance you use to configure the model for the training session.

`sessionParameters`

An [`MLTrainingSessionParameters`](/documentation/CreateML/MLTrainingSessionParameters) instance you use
to configure the training session.

## Return Value

An [`MLJob`](/documentation/CreateML/MLJob) that represents the hand action classifier’s
training session.

---

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