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prefect.artifacts

Interface for creating and reading artifacts.

Artifact

Bases: ArtifactCreate

An artifact is a piece of data that is created by a flow or task run. https://docs.prefect.io/latest/develop/artifacts

Parameters:

Name Type Description Default
type

A string identifying the type of artifact.

 required
key

A user-provided string identifier. The key must only contain lowercase letters, numbers, and dashes.

 required
description

A user-specified description of the artifact.

 required
data

A JSON payload that allows for a result to be retrieved.

 required
Source code in src/prefect/artifacts.py 
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class Artifact(ArtifactRequest):
    """
    An artifact is a piece of data that is created by a flow or task run.
    https://docs.prefect.io/latest/develop/artifacts

    Arguments:
        type: A string identifying the type of artifact.
        key: A user-provided string identifier.
          The key must only contain lowercase letters, numbers, and dashes.
        description: A user-specified description of the artifact.
        data: A JSON payload that allows for a result to be retrieved.
    """

    @sync_compatible
    async def create(
        self: "Self",
        client: Optional["PrefectClient"] = None,
    ) -> "ArtifactResponse":
        """
        A method to create an artifact.

        Arguments:
            client: The PrefectClient

        Returns:
            - The created artifact.
        """
        from prefect.context import MissingContextError, get_run_context

        client, _ = get_or_create_client(client)
        task_run_id, flow_run_id = get_task_and_flow_run_ids()

        try:
            get_run_context()
        except MissingContextError:
            warnings.warn(
                "Artifact creation outside of a flow or task run is deprecated and will be removed in a later version.",
                FutureWarning,
            )

        return await client.create_artifact(
            artifact=ArtifactRequest(
                type=self.type,
                key=self.key,
                description=self.description,
                task_run_id=self.task_run_id or task_run_id,
                flow_run_id=self.flow_run_id or flow_run_id,
                data=await self.format(),
            )
        )

    @classmethod
    @sync_compatible
    async def get(
        cls, key: Optional[str] = None, client: Optional["PrefectClient"] = None
    ) -> Optional["ArtifactResponse"]:
        """
        A method to get an artifact.

        Arguments:
            key (str, optional): The key of the artifact to get.
            client (PrefectClient, optional): The PrefectClient

        Returns:
            (ArtifactResponse, optional): The artifact (if found).
        """
        client, _ = get_or_create_client(client)
        return next(
            iter(
                await client.read_artifacts(
                    limit=1,
                    sort=ArtifactSort.UPDATED_DESC,
                    artifact_filter=ArtifactFilter(key=ArtifactFilterKey(any_=[key])),
                )
            ),
            None,
        )

    @classmethod
    @sync_compatible
    async def get_or_create(
        cls,
        key: Optional[str] = None,
        description: Optional[str] = None,
        data: Optional[Union[Dict[str, Any], Any]] = None,
        client: Optional["PrefectClient"] = None,
        **kwargs: Any,
    ) -> Tuple["ArtifactResponse", bool]:
        """
        A method to get or create an artifact.

        Arguments:
            key (str, optional): The key of the artifact to get or create.
            description (str, optional): The description of the artifact to create.
            data (Union[Dict[str, Any], Any], optional): The data of the artifact to create.
            client (PrefectClient, optional): The PrefectClient

        Returns:
            (ArtifactResponse): The artifact, either retrieved or created.
        """
        artifact = await cls.get(key, client)
        if artifact:
            return artifact, False
        else:
            return (
                await cls(key=key, description=description, data=data, **kwargs).create(
                    client
                ),
                True,
            )

    async def format(self) -> Optional[Union[Dict[str, Any], Any]]:
        return json.dumps(self.data)

create(client=None) async

A method to create an artifact.

Parameters:

Name Type Description Default
client Optional['PrefectClient']

The PrefectClient

 None

Returns:

Type Description
'ArtifactResponse'
  • The created artifact.
Source code in src/prefect/artifacts.py 
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@sync_compatible
async def create(
    self: "Self",
    client: Optional["PrefectClient"] = None,
) -> "ArtifactResponse":
    """
    A method to create an artifact.

    Arguments:
        client: The PrefectClient

    Returns:
        - The created artifact.
    """
    from prefect.context import MissingContextError, get_run_context

    client, _ = get_or_create_client(client)
    task_run_id, flow_run_id = get_task_and_flow_run_ids()

    try:
        get_run_context()
    except MissingContextError:
        warnings.warn(
            "Artifact creation outside of a flow or task run is deprecated and will be removed in a later version.",
            FutureWarning,
        )

    return await client.create_artifact(
        artifact=ArtifactRequest(
            type=self.type,
            key=self.key,
            description=self.description,
            task_run_id=self.task_run_id or task_run_id,
            flow_run_id=self.flow_run_id or flow_run_id,
            data=await self.format(),
        )
    )

get(key=None, client=None) async classmethod

A method to get an artifact.

Parameters:

Name Type Description Default
key str

The key of the artifact to get.

 None
client PrefectClient

The PrefectClient

 None

Returns:

Type Description
(Artifact, optional)

The artifact (if found).
Source code in src/prefect/artifacts.py 
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@classmethod
@sync_compatible
async def get(
    cls, key: Optional[str] = None, client: Optional["PrefectClient"] = None
) -> Optional["ArtifactResponse"]:
    """
    A method to get an artifact.

    Arguments:
        key (str, optional): The key of the artifact to get.
        client (PrefectClient, optional): The PrefectClient

    Returns:
        (ArtifactResponse, optional): The artifact (if found).
    """
    client, _ = get_or_create_client(client)
    return next(
        iter(
            await client.read_artifacts(
                limit=1,
                sort=ArtifactSort.UPDATED_DESC,
                artifact_filter=ArtifactFilter(key=ArtifactFilterKey(any_=[key])),
            )
        ),
        None,
    )

get_or_create(key=None, description=None, data=None, client=None, **kwargs) async classmethod

A method to get or create an artifact.

Parameters:

Name Type Description Default
key str

The key of the artifact to get or create.

 None
description str

The description of the artifact to create.

 None
data Union[Dict[str, Any], Any]

The data of the artifact to create.

 None
client PrefectClient

The PrefectClient

 None

Returns:

Type Description
Artifact

The artifact, either retrieved or created.
Source code in src/prefect/artifacts.py 
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@classmethod
@sync_compatible
async def get_or_create(
    cls,
    key: Optional[str] = None,
    description: Optional[str] = None,
    data: Optional[Union[Dict[str, Any], Any]] = None,
    client: Optional["PrefectClient"] = None,
    **kwargs: Any,
) -> Tuple["ArtifactResponse", bool]:
    """
    A method to get or create an artifact.

    Arguments:
        key (str, optional): The key of the artifact to get or create.
        description (str, optional): The description of the artifact to create.
        data (Union[Dict[str, Any], Any], optional): The data of the artifact to create.
        client (PrefectClient, optional): The PrefectClient

    Returns:
        (ArtifactResponse): The artifact, either retrieved or created.
    """
    artifact = await cls.get(key, client)
    if artifact:
        return artifact, False
    else:
        return (
            await cls(key=key, description=description, data=data, **kwargs).create(
                client
            ),
            True,
        )

ImageArtifact

Bases: Artifact

An artifact that will display an image from a publicly accessible URL in the UI.

Parameters:

Name Type Description Default
image_url

The URL of the image to display.

 required
Source code in src/prefect/artifacts.py 
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class ImageArtifact(Artifact):
    """
    An artifact that will display an image from a publicly accessible URL in the UI.

    Arguments:
        image_url: The URL of the image to display.
    """

    image_url: str
    type: Optional[str] = "image"

    async def format(self) -> str:
        """
        This method is used to format the artifact data so it can be properly sent
        to the API when the .create() method is called. It is async because the
        method is awaited in the parent class.

        Returns:
            str: The image URL.
        """
        return self.image_url

format() async

This method is used to format the artifact data so it can be properly sent to the API when the .create() method is called. It is async because the method is awaited in the parent class.

Returns:

Name Type Description
str str

The image URL.
Source code in src/prefect/artifacts.py 
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async def format(self) -> str:
    """
    This method is used to format the artifact data so it can be properly sent
    to the API when the .create() method is called. It is async because the
    method is awaited in the parent class.

    Returns:
        str: The image URL.
    """
    return self.image_url

TableArtifact

Bases: Artifact

Source code in src/prefect/artifacts.py 
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class TableArtifact(Artifact):
    table: Union[Dict[str, List[Any]], List[Dict[str, Any]], List[List[Any]]]
    type: Optional[str] = "table"

    @classmethod
    def _sanitize(
        cls, item: Union[Dict[str, Any], List[Any], float]
    ) -> Union[Dict[str, Any], List[Any], int, float, None]:
        """
        Sanitize NaN values in a given item.
        The item can be a dict, list or float.
        """
        if isinstance(item, list):
            return [cls._sanitize(sub_item) for sub_item in item]
        elif isinstance(item, dict):
            return {k: cls._sanitize(v) for k, v in item.items()}
        elif isinstance(item, float) and math.isnan(item):
            return None
        else:
            return item

    async def format(self) -> str:
        return json.dumps(self._sanitize(self.table))

create_image_artifact(image_url, key=None, description=None) async

Create an image artifact.

Parameters:

Name Type Description Default
image_url str

The URL of the image to display.

 required
key Optional[str]

A user-provided string identifier. Required for the artifact to show in the Artifacts page in the UI. The key must only contain lowercase letters, numbers, and dashes.

 None
description Optional[str]

A user-specified description of the artifact.

 None

Returns:

Type Description
UUID

The image artifact ID.
Source code in src/prefect/artifacts.py 
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@sync_compatible
async def create_image_artifact(
    image_url: str,
    key: Optional[str] = None,
    description: Optional[str] = None,
) -> UUID:
    """
    Create an image artifact.

    Arguments:
        image_url: The URL of the image to display.
        key: A user-provided string identifier.
          Required for the artifact to show in the Artifacts page in the UI.
          The key must only contain lowercase letters, numbers, and dashes.
        description: A user-specified description of the artifact.

    Returns:
        The image artifact ID.
    """

    artifact = await ImageArtifact(
        key=key,
        description=description,
        image_url=image_url,
    ).create()

    return artifact.id

Create a link artifact.

Parameters:

Name Type Description Default
link str

The link to create.

 required
link_text Optional[str]

The link text.

 None
key Optional[str]

A user-provided string identifier. Required for the artifact to show in the Artifacts page in the UI. The key must only contain lowercase letters, numbers, and dashes.

 None
description Optional[str]

A user-specified description of the artifact.

 None

Returns:

Type Description
UUID

The table artifact ID.
Source code in src/prefect/artifacts.py 
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@sync_compatible
async def create_link_artifact(
    link: str,
    link_text: Optional[str] = None,
    key: Optional[str] = None,
    description: Optional[str] = None,
    client: Optional["PrefectClient"] = None,
) -> UUID:
    """
    Create a link artifact.

    Arguments:
        link: The link to create.
        link_text: The link text.
        key: A user-provided string identifier.
          Required for the artifact to show in the Artifacts page in the UI.
          The key must only contain lowercase letters, numbers, and dashes.
        description: A user-specified description of the artifact.


    Returns:
        The table artifact ID.
    """
    artifact = await LinkArtifact(
        key=key,
        description=description,
        link=link,
        link_text=link_text,
    ).create(client)

    return artifact.id

create_markdown_artifact(markdown, key=None, description=None) async

Create a markdown artifact.

Parameters:

Name Type Description Default
markdown str

The markdown to create.

 required
key Optional[str]

A user-provided string identifier. Required for the artifact to show in the Artifacts page in the UI. The key must only contain lowercase letters, numbers, and dashes.

 None
description Optional[str]

A user-specified description of the artifact.

 None

Returns:

Type Description
UUID

The table artifact ID.
Source code in src/prefect/artifacts.py 
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@sync_compatible
async def create_markdown_artifact(
    markdown: str,
    key: Optional[str] = None,
    description: Optional[str] = None,
) -> UUID:
    """
    Create a markdown artifact.

    Arguments:
        markdown: The markdown to create.
        key: A user-provided string identifier.
          Required for the artifact to show in the Artifacts page in the UI.
          The key must only contain lowercase letters, numbers, and dashes.
        description: A user-specified description of the artifact.

    Returns:
        The table artifact ID.
    """
    artifact = await MarkdownArtifact(
        key=key,
        description=description,
        markdown=markdown,
    ).create()

    return artifact.id

create_progress_artifact(progress, key=None, description=None) async

Create a progress artifact.

Parameters:

Name Type Description Default
progress float

The percentage of progress represented by a float between 0 and 100.

 required
key Optional[str]

A user-provided string identifier. Required for the artifact to show in the Artifacts page in the UI. The key must only contain lowercase letters, numbers, and dashes.

 None
description Optional[str]

A user-specified description of the artifact.

 None

Returns:

Type Description
UUID

The progress artifact ID.
Source code in src/prefect/artifacts.py 
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@sync_compatible
async def create_progress_artifact(
    progress: float,
    key: Optional[str] = None,
    description: Optional[str] = None,
) -> UUID:
    """
    Create a progress artifact.

    Arguments:
        progress: The percentage of progress represented by a float between 0 and 100.
        key: A user-provided string identifier.
          Required for the artifact to show in the Artifacts page in the UI.
          The key must only contain lowercase letters, numbers, and dashes.
        description: A user-specified description of the artifact.

    Returns:
        The progress artifact ID.
    """

    artifact = await ProgressArtifact(
        key=key,
        description=description,
        progress=progress,
    ).create()

    return artifact.id

create_table_artifact(table, key=None, description=None) async

Create a table artifact.

Parameters:

Name Type Description Default
table Union[Dict[str, List[Any]], List[Dict[str, Any]], List[List[Any]]]

The table to create.

 required
key Optional[str]

A user-provided string identifier. Required for the artifact to show in the Artifacts page in the UI. The key must only contain lowercase letters, numbers, and dashes.

 None
description Optional[str]

A user-specified description of the artifact.

 None

Returns:

Type Description
UUID

The table artifact ID.
Source code in src/prefect/artifacts.py 
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@sync_compatible
async def create_table_artifact(
    table: Union[Dict[str, List[Any]], List[Dict[str, Any]], List[List[Any]]],
    key: Optional[str] = None,
    description: Optional[str] = None,
) -> UUID:
    """
    Create a table artifact.

    Arguments:
        table: The table to create.
        key: A user-provided string identifier.
          Required for the artifact to show in the Artifacts page in the UI.
          The key must only contain lowercase letters, numbers, and dashes.
        description: A user-specified description of the artifact.

    Returns:
        The table artifact ID.
    """

    artifact = await TableArtifact(
        key=key,
        description=description,
        table=table,
    ).create()

    return artifact.id

update_progress_artifact(artifact_id, progress, description=None, client=None) async

Update a progress artifact.

Parameters:

Name Type Description Default
artifact_id UUID

The ID of the artifact to update.

 required
progress float

The percentage of progress represented by a float between 0 and 100.

 required
description Optional[str]

A user-specified description of the artifact.

 None

Returns:

Type Description
UUID

The progress artifact ID.
Source code in src/prefect/artifacts.py 
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@sync_compatible
async def update_progress_artifact(
    artifact_id: UUID,
    progress: float,
    description: Optional[str] = None,
    client: Optional[PrefectClient] = None,
) -> UUID:
    """
    Update a progress artifact.

    Arguments:
        artifact_id: The ID of the artifact to update.
        progress: The percentage of progress represented by a float between 0 and 100.
        description: A user-specified description of the artifact.

    Returns:
        The progress artifact ID.
    """

    client, _ = get_or_create_client(client)

    artifact = ProgressArtifact(
        description=description,
        progress=progress,
    )
    update = (
        ArtifactUpdate(
            description=artifact.description,
            data=await artifact.format(),
        )
        if description
        else ArtifactUpdate(data=await artifact.format())
    )

    await client.update_artifact(
        artifact_id=artifact_id,
        artifact=update,
    )

    return artifact_id