TypeError: unsupported operand type(s) for /: 'str' and 'str' when using MlflowArtifactDataSet with MlflowModelSaverDataSet

[turn1a]

Description

TypeError: unsupported operand type(s) for /: 'str' and 'str' occurs when MlflowArtifactDataSet is used with MlflowModelSaverDataSet.

Context

Logging locally and to MLflow in one step.

Steps to Reproduce

sklearn_model:
    type: kedro_mlflow.io.artifacts.MlflowArtifactDataSet
    data_set:
        type: kedro_mlflow.io.models.MlflowModelSaverDataSet
        flavor: mlflow.sklearn
        filepath: data/06_models/sklearn_model
        versioned: true

Expected Result

The model should be saved locally and in MLflow run at the same time.

Actual Result

Traceback (most recent call last):
  File "/Users/olszewk2/miniconda3/envs/pyzypad-example-env/lib/python3.7/site-packages/kedro/io/core.py", line 240, in save
    self._save(data)
  File "/Users/olszewk2/dev/pyzypad-example/src/kedro-mlflow/kedro_mlflow/io/artifacts/mlflow_artifact_dataset.py", line 40, in _save
    if hasattr(self, "_version")
  File "/Users/olszewk2/miniconda3/envs/pyzypad-example-env/lib/python3.7/site-packages/kedro/io/core.py", line 605, in _get_save_path
    versioned_path = self._get_versioned_path(save_version)  # type: ignore
  File "/Users/olszewk2/miniconda3/envs/pyzypad-example-env/lib/python3.7/site-packages/kedro/io/core.py", line 616, in _get_versioned_path
    return self._filepath / version / self._filepath.name
TypeError: unsupported operand type(s) for /: 'str' and 'str'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/Users/olszewk2/miniconda3/envs/pyzypad-example-env/bin/kedro", line 8, in <module>
    sys.exit(main())
  File "/Users/olszewk2/miniconda3/envs/pyzypad-example-env/lib/python3.7/site-packages/kedro/framework/cli/cli.py", line 725, in main
    cli_collection()
  File "/Users/olszewk2/miniconda3/envs/pyzypad-example-env/lib/python3.7/site-packages/click/core.py", line 829, in __call__
    return self.main(*args, **kwargs)
  File "/Users/olszewk2/miniconda3/envs/pyzypad-example-env/lib/python3.7/site-packages/click/core.py", line 782, in main
    rv = self.invoke(ctx)
  File "/Users/olszewk2/miniconda3/envs/pyzypad-example-env/lib/python3.7/site-packages/click/core.py", line 1259, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/Users/olszewk2/miniconda3/envs/pyzypad-example-env/lib/python3.7/site-packages/click/core.py", line 1066, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/Users/olszewk2/miniconda3/envs/pyzypad-example-env/lib/python3.7/site-packages/click/core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "/Users/olszewk2/dev/pyzypad-example/kedro_cli.py", line 230, in run
    pipeline_name=pipeline,
  File "/Users/olszewk2/miniconda3/envs/pyzypad-example-env/lib/python3.7/site-packages/kedro/framework/context/context.py", line 767, in run
    raise exc
  File "/Users/olszewk2/miniconda3/envs/pyzypad-example-env/lib/python3.7/site-packages/kedro/framework/context/context.py", line 759, in run
    run_result = runner.run(filtered_pipeline, catalog, run_id)
  File "/Users/olszewk2/miniconda3/envs/pyzypad-example-env/lib/python3.7/site-packages/kedro/runner/runner.py", line 101, in run
    self._run(pipeline, catalog, run_id)
  File "/Users/olszewk2/miniconda3/envs/pyzypad-example-env/lib/python3.7/site-packages/kedro/runner/sequential_runner.py", line 90, in _run
    run_node(node, catalog, self._is_async, run_id)
  File "/Users/olszewk2/miniconda3/envs/pyzypad-example-env/lib/python3.7/site-packages/kedro/runner/runner.py", line 213, in run_node
    node = _run_node_sequential(node, catalog, run_id)
  File "/Users/olszewk2/miniconda3/envs/pyzypad-example-env/lib/python3.7/site-packages/kedro/runner/runner.py", line 249, in _run_node_sequential
    catalog.save(name, data)
  File "/Users/olszewk2/miniconda3/envs/pyzypad-example-env/lib/python3.7/site-packages/kedro/io/data_catalog.py", line 448, in save
    func(data)
  File "/Users/olszewk2/miniconda3/envs/pyzypad-example-env/lib/python3.7/site-packages/kedro/io/core.py", line 625, in save
    super().save(data)
  File "/Users/olszewk2/miniconda3/envs/pyzypad-example-env/lib/python3.7/site-packages/kedro/io/core.py", line 247, in save
    raise DataSetError(message) from exc
kedro.io.core.DataSetError: Failed while saving data to data set MlflowMlflowModelSaverDataSet(filepath=/Users/olszewk2/dev/pyzypad-example/data/06_models/pclass_encoder, flavor=mlflow.sklearn, load_args={}, save_args={}, version=Version(load=None, save='2020-11-06T12.28.57.593Z')).
unsupported operand type(s) for /: 'str' and 'str'

Your Environment

Include as many relevant details about the environment in which you experienced the bug:

• kedro 0.16.6
• kedro-mlflow 0.4.0
• Python 3.7.7
• MacOS Catalina

Does the bug also happen with the last version on develop?

Yes.