unionml.model.Model#

class unionml.model.Model(name='model', init=None, *, dataset, hyperparameter_config=None)#

Initialize a UnionML Model.

The term UnionML Model refers to the specification of a model, which the user defines through the functional entrypoints, e.g. unionml.model.Model.trainer(). The term model object is used to refer to some instance of model from a machine learning framework such as the subclasses of the BaseEstimator class in sklearn, Module in pytorch, etc.

Parameters:

name (str) – name of the model
init (Union[Type, Callable, None]) – a class or callable that produces a model object (e.g. an sklearn estimator) when invoked.
dataset (Dataset) – a UnionML Dataset object to bind to the model.
hyperparameter_config (Optional[Dict[str, Type]]) –
A dictionary mapping hyperparameter names to types. This is used to determine the hyperparameter names and types associated with the model object produced by the init argument. For example:
```
>>> {
...    "hyperparameter1": int,
...    "hyperparameter2": str,
...    "hyperparameter3": float,
... }
```

Methods

`add_predictor_schedule`	Add a prediction schedule to the model.
`add_trainer_schedule`	Add a training schedule to the model.
`evaluator`	Register a function for producing metrics for given model object.
`init`	Register a function for initializing a model object.
`load`	Load a model object from disk.
`load_from_env`	Load a model object from an environment variable pointing to the model file.
`loader`	Register a function for deserializing a model object to disk.
`predict`	Generate predictions locally.
`predict_from_features_task`	Create a Flyte task for generating predictions from a model object.
`predict_from_features_workflow`	Create a Flyte prediction workflow using raw features.
`predict_task`	Create a Flyte task for generating predictions from a model object.
`predict_workflow`	Create a Flyte prediction workflow using features from the `dataset.reader` as the data source.
`predictor`	Register a function that generates predictions from a model object.
`remote`	Configure the `unionml.Model` for remote backend deployment.
`remote_activate_schedules`	Activate deployed schedules.
`remote_deactivate_schedules`	Deactivate deployed schedules.
`remote_deploy`	Deploy model services to a Flyte backend.
`remote_fetch_model`	Fetch predictions from a Flyte execution.
`remote_fetch_predictions`	Fetch predictions from a Flyte execution.
`remote_list_model_versions`	Lists all the model versions of this UnionML app, in reverse chronological order.
`remote_list_prediction_ids`	Lists all the prediction ids of this UnionML app, in reverse chronological order.
`remote_list_scheduled_prediction_runs`	Lists executions associated with a prediction schedule, sorted from most to least recent.
`remote_list_scheduled_training_runs`	Lists executions associated with a training schedule, sorted from most to least recent.
`remote_load`	Load a `ModelArtifact` based on the provided Flyte execution.
`remote_predict`	Generate predictions on a remote Flyte backend.
`remote_train`	Train a model object on a remote Flyte backend.
`remote_wait`	Wait for a `FlyteWorkflowExecution` to complete and returns the execution's output.
`resolve_model_artifact`	Get a `ModelArtifact` from multiple sources.
`save`	Save the model object to disk.
`saver`	Register a function for serializing a model object to disk.
`schedule_prediction`	Schedule the prediction service when the UnionML app is deployed.
`schedule_training`	Schedule the training service when the UnionML app is deployed.
`serve`	Create a FastAPI serving app.
`train`	Train a model object locally
`train_task`	Create a Flyte task for training a model object.
`train_workflow`	Create a Flyte training workflow for model object training.
`trainer`	Register a function for training a model object.

Attributes

`artifact`	Model artifact associated with the `unionml.Model` .
`config_file`	Path to the config file associated with the Flyte backend.
`dataset`	Exposes the `unionml.Dataset` associated with the model.
`dockerfile`	Path to Docker file used to package the UnionML app.
`hyperparameter_type`	Hyperparameter type of the model object based on the `init` function signature.
`model_type`
`predict_callbacks`
`predict_from_features_workflow_name`	Name of the prediction workflow used to generate predictions from raw features.
`predict_workflow_name`	Name of the prediction workflow used to generate predictions from the `dataset.reader` .
`prediction_schedule_names`	Names of all the prediction schedules.
`prediction_schedules`	Scheduled prediction jobs.
`prediction_type`
`registry`	Docker registry used to push UnionML app.
`train_workflow_name`	Name of the training workflow.
`trainer_params`	Parameters used to create a Flyte workflow for model object training.
`training_schedule_names`	Names of all the training schedules.
`training_schedules`	Scheduled training jobs.

_default_loader(file, *args, **kwargs)#

Default model loader.

Supports sklearn estimators, pytorch modules, and keras models.

Parameters:

file (Union[str, PathLike, IO]) – str, path-like, or file-like object to read from.
args – additional args to forward to the underlying deserialization function.
kwargs – additional kwargs to forward to the underlying deserialization function.

Return type:

Any

The methods/functions for each associated model type are:

sklearn estimators: joblib.load
pytorch modules: torch.load
keras models: Model.load_model

_default_saver(model_obj, hyperparameters, file, *args, **kwargs)#

Default model saver.

Supports sklearn estimators, pytorch modules, and keras models.

Parameters:

model_obj (Any) – model object to serialize.
hyperparameters (Union[dict, BaseHyperparameters, None]) – hyperparameters associated with the model object.
file (Union[str, PathLike, IO]) – str, path-like, or file-like object to write the contents of the model object to.
args – additional args to forward to the underlying serialization function.
kwargs – additional kwargs to forward to the underlying serialization function.

Return type:

Any

The methods/functions for each associated model type are:

sklearn estimators: joblib.dump
pytorch modules: torch.save
keras models: Model.save

add_predictor_schedule(schedule)#

Add a prediction schedule to the model.

Parameters:: schedule (Schedule) – schedule specification to add

add_trainer_schedule(schedule)#

Add a training schedule to the model.

Parameters:: schedule (Schedule) – schedule specification to add

property artifact: Optional[ModelArtifact]#

Model artifact associated with the unionml.Model .

This attribute is set when calling the following methods: - train - load - load_from_env - load_from_env - remote_load - remote_train with the wait=True kwarg.

property config_file: Optional[str]#: Path to the config file associated with the Flyte backend.

property dataset: Dataset#: Exposes the unionml.Dataset associated with the model.

property dockerfile: Optional[str]#: Path to Docker file used to package the UnionML app.

evaluator(fn)#: Register a function for producing metrics for given model object.

property hyperparameter_type: Type#: Hyperparameter type of the model object based on the init function signature.

init(fn)#: Register a function for initializing a model object.

load(file, *args, **kwargs)#

Load a model object from disk.

File:

a string or path-like object to load a model from.

Parameters:

args – positional arguments forwarded to unionml.Model.loader() .
kwargs – key-word arguments forwarded to unionml.Model.loader() .

load_from_env(env_var='UNIONML_MODEL_PATH', *args, **kwargs)#

Load a model object from an environment variable pointing to the model file.

Env_var:

environment variable referencing a path to load a model from.

Parameters:

args – positional arguments forwarded to unionml.Model.loader() .
kwargs – key-word arguments forwarded to unionml.Model.loader() .

loader(fn)#: Register a function for deserializing a model object to disk.

predict(features=None, **reader_kwargs)#

Generate predictions locally.

You can either pass this function raw features via the features argument or you can pass in keyword arguments that will be forwarded to the unionml.Dataset.reader() method as the feature source.

Parameters:

features (Optional[Any]) – Raw features that are pre-processed by the :py:class:unionml.Dataset methods in the following order: - unionml.dataset.Dataset.feature_loader() - unionml.dataset.Dataset.feature_transformer()
reader_kwargs – keyword arguments that correspond to the unionml.Dataset.reader() method signature.

predict_from_features_task()#

Create a Flyte task for generating predictions from a model object.

This is used in the Flyte workflow produced by predict_from_features_workflow.

predict_from_features_workflow()#: Create a Flyte prediction workflow using raw features.

property predict_from_features_workflow_name#: Name of the prediction workflow used to generate predictions from raw features.

predict_task()#

Create a Flyte task for generating predictions from a model object.

This is used in the Flyte workflow produced by predict_workflow.

predict_workflow()#: Create a Flyte prediction workflow using features from the dataset.reader as the data source.

property predict_workflow_name#: Name of the prediction workflow used to generate predictions from the dataset.reader .

property prediction_schedule_names: List[str]#: Names of all the prediction schedules.

property prediction_schedules: List[Schedule]#: Scheduled prediction jobs.

predictor(fn=None, callbacks=None, **predict_task_kwargs)#

This function is the primary entrypoint for defining your application’s prediction behavior.

See the User Guide for more.

Parameters:

fn – function to use as the predictor.
train_task_kwargs – keyword arguments to pass into the flytekit task that will be composed of the input fn and functions defined in the bound Dataset.

property registry: Optional[str]#: Docker registry used to push UnionML app.

remote(registry=None, image_name=None, dockerfile='Dockerfile', patch_destination_dir='/root', config_file=None, project=None, domain=None)#

Configure the unionml.Model for remote backend deployment.

Parameters:

registry (Optional[str]) – Docker registry used to push UnionML app.
image_name (Optional[str]) – image name to give to the Docker image associated with the UnionML app.
dockerfile (str) – path to the Dockerfile used to package the UnionML app.
patch_destination_dir (str) – path where the UnionML source is installed within the docker image, and in case of patch registration, this would be replaced. In Flyte terms, patch registration is often called fast-registration.
config_file (Optional[str]) – path to the flytectl config to use for deploying your UnionML app to a Flyte backend.
project (Optional[str]) – deploy your app to this Flyte project name.
domain (Optional[str]) – deploy your app to this Flyte domain name.

remote_activate_schedules(app_version=None, schedule_names=None)#

Activate deployed schedules.

Parameters:

app_version (Optional[str]) – the version to use to fetch the scheduled launchplans. If None, uses gitsha as the version.
schedule_names (Optional[List[str]]) – names of schedules to activate.

remote_deactivate_schedules(app_version=None, schedule_names=None)#

Deactivate deployed schedules.

Parameters:

app_version (Optional[str]) – the version to use to fetch the scheduled launchplans. If None, uses gitsha as the version.
schedule_names (Optional[List[str]]) – names of schedules to deactivate.

remote_deploy(app_version=None, allow_uncommitted=False, patch=False, schedule=True)#

Deploy model services to a Flyte backend.

Parameters:

app_version (Optional[str]) – the version to use to deploy the UnionML app. If None, uses gitsha as the version.
allow_uncommitted (bool) – If True, deploys uncommitted changes in the unionml project. Otherwise, raise a :py:class`~unionml.remote.VersionFetchError`
patch (bool) – if True, this bypasses the Docker build process and only updates the UnionML app source code using the latest available image.
schedule (bool) – indicates whether or not to deploy the training and prediction schedules.

Return type:

str

Returns:

app version string

remote_fetch_model(execution)#

Fetch predictions from a Flyte execution.

Parameters:: execution (FlyteWorkflowExecution) – a Flyte workflow execution, which is the output of remote_predict(..., wait=False) .
Return type:: ModelArtifact

remote_fetch_predictions(execution)#

Fetch predictions from a Flyte execution.

Parameters:: execution (FlyteWorkflowExecution) – a Flyte workflow execution, which is the output of remote_predict(..., wait=False) .
Return type:: Any

remote_list_model_versions(app_version=None, limit=10)#

Lists all the model versions of this UnionML app, in reverse chronological order.

Parameters:

app_version (Optional[str]) – if provided, lists the model versions associated with this app version. By default, this uses the current git sha of the repo, which versions your UnionML app.
limit (int) – limit the number results to fetch.

Return type:

List[str]

remote_list_prediction_ids(app_version=None, limit=10)#

Lists all the prediction ids of this UnionML app, in reverse chronological order.

Prediction ids are unique identifiers given to each batch prediction run that’s executed remotely on a Flyte cluster.

Parameters:

app_version (Optional[str]) – if provided, lists the model versions associated with this app version. By default, this uses the current git sha of the repo, which versions your UnionML app.
limit (int) – limit the number results to fetch.

Return type:

List[str]

remote_list_scheduled_prediction_runs(schedule_name, app_version=None, limit=5)#

Lists executions associated with a prediction schedule, sorted from most to least recent.

Parameters:

schedule_name (str) – fetch runs for this prediction schedule.
limit (int) – number of executions to list.

Return type:

List[FlyteWorkflowExecution]

Returns:

a list of FlyteWorkflowExecution objects

remote_list_scheduled_training_runs(schedule_name, app_version=None, limit=5)#

Lists executions associated with a training schedule, sorted from most to least recent.

Parameters:

schedule_name (str) – fetch runs for this training schedule.
limit (int) – number of executions to list.

Return type:

List[FlyteWorkflowExecution]

Returns:

a list of FlyteWorkflowExecution objects

remote_load(execution)#

Load a ModelArtifact based on the provided Flyte execution.

Parameters:: execution (FlyteWorkflowExecution) – a Flyte workflow execution, which is the output of remote_train(..., wait=False) .

remote_predict(app_version=None, model_version=None, wait=True, *, features=None, **reader_kwargs)#

Generate predictions on a remote Flyte backend.

You can either pass this function raw features via the features argument or you can pass in keyword arguments that will be forwarded to the unionml.Dataset.reader() method as the feature source.

Parameters:

app_version (Optional[str]) – if provided, executes a prediction job using the specified UnionML app version. By default, this uses the latest app version deployed on the Flyte remote cluster.
model_version (Optional[str]) – if provided, executes a prediction job using the specified model version. By default, this uses the latest Flyte execution id as the model version.
wait (bool) – if True, this is a synchronous operation, returning a ModelArtifact. Otherwise, this function returns a FlyteWorkflowExecution.
features (Optional[Any]) –
Raw features that are pre-processed by the :py:class:unionml.Dataset methods in the following order:
- unionml.dataset.Dataset.feature_loader()
- unionml.dataset.Dataset.feature_transformer()
reader_kwargs – keyword arguments that correspond to the unionml.Dataset.reader() method signature.

Return type:

Union[Any, FlyteWorkflowExecution]

Returns:

the predictions if wait is True, or a FlyteWorkflowExecution object if wait is False.

remote_train(app_version=None, wait=True, *, hyperparameters=None, loader_kwargs=None, splitter_kwargs=None, parser_kwargs=None, trainer_kwargs=None, **reader_kwargs)#

Train a model object on a remote Flyte backend.

Parameters:

app_version (Optional[str]) – if provided, executes a training job using the specified UnionML app version. By default, this uses the latest app version deployed on the Flyte remote cluster.
wait (bool) – if True, this is a synchronous operation, returning a ModelArtifact. Otherwise, this function returns a FlyteWorkflowExecution.
hyperparameters (Optional[Dict[str, Any]]) – a dictionary mapping hyperparameter names to values. This is passed into the init callable to initialize a model object.
loader_kwargs (Optional[Dict[str, Any]]) – key-word arguments to pass to the registered unionml.Dataset.loader() function. This will override any defaults set in the function definition.
splitter_kwargs (Optional[Dict[str, Any]]) – key-word arguments to pass to the registered unionml.Dataset.splitter() function. This will override any defaults set in the function definition.
parser_kwargs (Optional[Dict[str, Any]]) – key-word arguments to pass to the registered unionml.Dataset.parser() function. This will override any defaults set in the function definition.
trainer_kwargs (Optional[Dict[str, Any]]) – a dictionary mapping training parameter names to values. There training parameters are determined by the keyword-only arguments of the model.trainer function.
reader_kwargs – keyword arguments that correspond to the unionml.Dataset.reader() method signature.

Return type:

Union[ModelArtifact, FlyteWorkflowExecution]

Returns:

the trained model if wait is True, or a FlyteWorkflowExecution object if wait is False.

remote_wait(execution, **kwargs)#

Wait for a FlyteWorkflowExecution to complete and returns the execution’s output.

Return type:: FlyteWorkflowExecution

resolve_model_artifact(model_object=None, model_version=None, app_version=None, model_file=None, loader_kwargs=None)#

Get a ModelArtifact from multiple sources.

This method produces a model artifact from the following sources: - an in-memory model_object - a Flyte cluster execution via model_version and app_version - a serialized model object via model_file and loader_kwargs

If no arguments are provided, this method simply returns the artifact.

Parameters:

model – Model to use for resolving a model object.
model_object (Optional[Any]) – model object to use for prediction.
model_version (Optional[str]) – model version identifier to use for prediction.
app_version (Optional[str]) – if model_version is specified, this argument indicates the app version to use for fetching the model artifact.
model_file (Union[str, Path, None]) – a filepath to a serialized model object.
loader_kwargs (Optional[dict]) – additional keyword arguments to be forwarded to the unionml.model.Model.loader() function.

Return type:

ModelArtifact

save(file, *args, **kwargs)#: Save the model object to disk.

saver(fn)#: Register a function for serializing a model object to disk.

schedule_prediction(name, *, expression=None, offset=None, fixed_rate=None, reader_time_arg=None, activate_on_deploy=True, launchplan_kwargs=None, model_object=None, model_version=None, app_version=None, model_file=None, loader_kwargs=None, **reader_kwargs)#

Schedule the prediction service when the UnionML app is deployed.

The model used for prediction must be from one of the following sources:

An in-memory model object specified via the model_object argument.
A model version associated with a Flyte cluster execution speciied via the model_version and app_version arguments.
A serialized model object specified via the model_file argument.

Parameters:

name (str) – unique name of the launch plan
expression (Optional[str]) – a cron expression (see here) or valid croniter schedule for e.g. @hourly, @daily, @weekly, @monthly, @yearly (see here).
offset (Optional[str]) – duration to offset the schedule, must be a valid ISO 8601 duration <https://en.wikipedia.org/wiki/ISO_8601>__ . Only used if ``expression` is specified.
fixed_rate (Optional[timedelta]) – a timedelta object representing fixed rate with which to run the workflow.
reader_time_arg (Optional[str]) – if not None, the name of the reader() argument that will receive the kickoff datetime of the scheduled launchplan.
activate_on_deploy (bool) – Whether or not to automatically activate this schedule on app deployment.
launchplan_kwargs (Optional[dict]) – additional keyword arguments to pass to LaunchPlan
model_object (Optional[Any]) – model object to use for prediction.
model_version (Optional[str]) – model version identifier to use for prediction.
app_version (Optional[str]) – if model_version is specified, this argument indicates the app version to use for fetching the model artifact.
model_file (Union[str, Path, None]) – a filepath to a serialized model object.
loader_kwargs (Optional[dict]) – additional keyword arguments to be forwarded to the unionml.model.Model.loader() function.
reader_kwargs – keyword arguments that correspond to the unionml.dataset.Dataset.reader() method signature.

schedule_training(name, *, expression=None, offset=None, fixed_rate=None, reader_time_arg=None, activate_on_deploy=True, launchplan_kwargs=None, hyperparameters=None, loader_kwargs=None, splitter_kwargs=None, parser_kwargs=None, trainer_kwargs=None, **reader_kwargs)#

Schedule the training service when the UnionML app is deployed.

Parameters:

name (str) – unique name of the launch plan
expression (Optional[str]) – a cron expression (see here) or valid croniter schedule for e.g. @daily, @hourly, @weekly, @yearly (see here).
offset (Optional[str]) – duration to offset the schedule, must be a valid ISO 8601 duration <https://en.wikipedia.org/wiki/ISO_8601>__ . Only used if ``expression` is specified.
fixed_rate (Optional[timedelta]) – a timedelta object representing fixed rate with which to run the workflow.
reader_time_arg (Optional[str]) – if not None, the name of the reader() argument that will receive the kickoff datetime of the scheduled launchplan.
activate_on_deploy (bool) – Whether or not to automatically activate this schedule on app deployment.
launchplan_kwargs (Optional[dict]) – additional keyword arguments to pass to LaunchPlan
hyperparameters (Optional[Dict[str, Any]]) – a dictionary mapping hyperparameter names to values. This is passed into the init callable to initialize a model object.
loader_kwargs (Optional[Dict[str, Any]]) – key-word arguments to pass to the registered unionml.Dataset.loader() function. This will override any defaults set in the function definition.
splitter_kwargs (Optional[Dict[str, Any]]) – key-word arguments to pass to the registered unionml.Dataset.splitter() function. This will override any defaults set in the function definition.
parser_kwargs (Optional[Dict[str, Any]]) – key-word arguments to pass to the registered unionml.Dataset.parser() function. This will override any defaults set in the function definition.
trainer_kwargs (Optional[Dict[str, Any]]) – a dictionary mapping training parameter names to values. There training parameters are determined by the keyword-only arguments of the model.trainer function.
reader_kwargs – keyword arguments that correspond to the unionml.dataset.Dataset.reader() method signature.

serve(app, remote=False, app_version=None, model_version='latest')#

Create a FastAPI serving app.

Parameters:: app (FastAPI) – A FastAPI app to use for model serving.

train(hyperparameters=None, loader_kwargs=None, splitter_kwargs=None, parser_kwargs=None, trainer_kwargs=None, **reader_kwargs)#

Train a model object locally

Parameters:

hyperparameters (Optional[Dict[str, Any]]) – a dictionary mapping hyperparameter names to values. This is passed into the init callable to initialize a model object.
loader_kwargs (Optional[Dict[str, Any]]) – key-word arguments to pass to the registered unionml.dataset.Dataset.loader() function. This will override any defaults set in the function definition.
splitter_kwargs (Optional[Dict[str, Any]]) – key-word arguments to pass to the registered unionml.dataset.Dataset.splitter() function. This will override any defaults set in the function definition.
parser_kwargs (Optional[Dict[str, Any]]) – key-word arguments to pass to the registered unionml.dataset.Dataset.parser() function. This will override any defaults set in the function definition.
trainer_kwargs (Optional[Dict[str, Any]]) – a dictionary mapping training parameter names to values. There training parameters are determined by the keyword-only arguments of the model.trainer function.
reader_kwargs – keyword arguments that correspond to the unionml.Dataset.reader() method signature.

Return type:

Tuple[Any, Any]

The train method invokes an execution graph that composes together the following functions to train and evaluate a model:

unionml.Dataset.reader()

unionml.Dataset.loader()

unionml.Dataset.splitter()

unionml.Dataset.parser()

unionml.Model.trainer()

unionml.Model.predictor()

unionml.Model.evaluator()

train_task()#

Create a Flyte task for training a model object.

This is used in the Flyte workflow produced by train_workflow.

train_workflow()#: Create a Flyte training workflow for model object training.

property train_workflow_name#: Name of the training workflow.

trainer(fn=None, **train_task_kwargs)#

This function is the primary entrypoint for defining your application’s model-training behavior.

See the User Guide for more.

Parameters:

fn (Optional[Callable]) – function to use as the trainer.
train_task_kwargs – keyword arguments to pass into the flytekit task that will be composed of the input fn and functions defined in the bound Dataset.

property trainer_params: Dict[str, Parameter]#: Parameters used to create a Flyte workflow for model object training.

property training_schedule_names: List[str]#: Names of all the training schedules.

property training_schedules: List[Schedule]#: Scheduled training jobs.