Experiment created when downloading artifact

[AlexandreBrown]

Describe the Bug

When instantiating an Experiment class to download an artifact, the experiment gets created on cometml.com even tho I did not log anything.

Expected behavior

A dummy experiment should not be created every time we donwload an artifact.
No experiment should be created, we should be able to just download the artifact we want.

Where is the issue?

• [x] Comet Python SDK
• [ ] Comet UI
• [ ] Third Party Integrations (Huggingface, TensorboardX, Pytorch Lighting etc)

To Reproduce

Steps to reproduce the behavior:

experiment = Experiment(api_key=api_key, project_name=project_name, workspace=workspace)
artifact = experiment.get_artifact(artifact_name)
artifact.download(output_dir)

Comet Debug Log

comet.log

Screenshots or GIFs

Link to Comet Project/Experiment

Additional context

Using comet-ml version 3.38.1

Workaround

• Delete the experiment after the download

  
  from pathlib import Path
  from comet_ml import Experiment
  from comet_ml import API  

def download_artifact(api_key: str, project_name: str, workspace: str, artifact_name: str, output_dir: Path) -> Path: experiment = Experiment(api_key=api_key, project_name=project_name, workspace=workspace) artifact = experiment.get_artifact(artifact_name) artifact_path = Path(artifact.assets[0].logical_path) artifact.download(output_dir)

# Workaround for deleting the dummy experiment created during the download
api = API(api_key=api_key)
api.delete_experiment(experiment_key=experiment.get_key())

return output_dir / artifact_path

[dsblank]

@AlexandreBrown , indeed you are creating the experiment when you execute Experiment().

You can use the ExistingExperiment() or the APIExperiment() class interfaces. See https://www.comet.com/docs/v2/api-and-sdk/python-sdk/experiment-overview/

One way: https://www.comet.com/docs/v2/api-and-sdk/python-sdk/reference/ExistingExperiment/#existingexperimentget_artifact

from comet_ml import ExistingExperiment

experiment = ExistingExperiment(previous_experiment=KEY)
experiment.get_artifact(...)

Another way: https://www.comet.com/docs/v2/api-and-sdk/python-sdk/reference/API/#apiget_artifact_files

from comet_ml import API

api = API()
api.get_artifact_files("demo", artifact_name="demo-artifact", version="2.0.0")