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Workflow

Workflow

Bases: Structure

Source code in griptape/griptape/structures/workflow.py 
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@define
class Workflow(Structure):
    futures_executor: futures.Executor = field(default=Factory(lambda: futures.ThreadPoolExecutor()), kw_only=True)

    def add_task(self, task: BaseTask) -> BaseTask:
        task.preprocess(self)

        if self.output_task:
            self.output_task.child_ids.append(task.id)
            task.parent_ids.append(self.output_task.id)

        self.tasks.append(task)

        return task

    def insert_tasks(
        self,
        parent_tasks: BaseTask | list[BaseTask],
        tasks: BaseTask | list[BaseTask],
        child_tasks: BaseTask | list[BaseTask],
        preserve_relationship: bool = False,
    ) -> list[BaseTask]:
        """Insert tasks between parent and child tasks in the workflow.

        Args:
            parent_tasks: The tasks that will be the parents of the new tasks.
            tasks: The tasks to insert between the parent and child tasks.
            child_tasks: The tasks that will be the children of the new tasks.
            preserve_relationship: Whether to preserve the parent/child relationship when inserting between parent and child tasks.
        """

        if not isinstance(parent_tasks, list):
            parent_tasks = [parent_tasks]
        if not isinstance(tasks, list):
            tasks = [tasks]
        if not isinstance(child_tasks, list):
            child_tasks = [child_tasks]

        for task in tasks:
            self.insert_task(parent_tasks, task, child_tasks, preserve_relationship)

        return tasks

    def insert_task(
        self,
        parent_tasks: list[BaseTask],
        task: BaseTask,
        child_tasks: list[BaseTask],
        preserve_relationship: bool = False,
    ) -> BaseTask:
        task.preprocess(self)

        for child_task in child_tasks:
            # Link the new task to the child task
            if child_task.id not in task.child_ids:
                task.child_ids.append(child_task.id)
            if task.id not in child_task.parent_ids:
                child_task.parent_ids.append(task.id)

        if not preserve_relationship:
            for parent_task in parent_tasks:
                for child_task in child_tasks:
                    # Remove the old parent/child relationship
                    if child_task.id in parent_task.child_ids:
                        parent_task.child_ids.remove(child_task.id)
                    if parent_task.id in child_task.parent_ids:
                        child_task.parent_ids.remove(parent_task.id)

        for parent_task in parent_tasks:
            # Link the new task to the parent task
            if parent_task.id not in task.parent_ids:
                task.parent_ids.append(parent_task.id)
            if task.id not in parent_task.child_ids:
                parent_task.child_ids.append(task.id)

            parent_index = self.tasks.index(parent_task)
            self.tasks.insert(parent_index + 1, task)

        return task

    def try_run(self, *args) -> Workflow:
        self._execution_args = args
        ordered_tasks = self.order_tasks()
        exit_loop = False

        while not self.is_finished() and not exit_loop:
            futures_list = {}

            for task in ordered_tasks:
                if task.can_execute():
                    future = self.futures_executor.submit(task.execute)
                    futures_list[future] = task

            # Wait for all tasks to complete
            for future in futures.as_completed(futures_list):
                if isinstance(future.result(), ErrorArtifact):
                    exit_loop = True

                    break

        if self.conversation_memory:
            run = Run(input=self.input_task.input.to_text(), output=self.output_task.output.to_text())

            self.conversation_memory.add_run(run)

        self._execution_args = ()

        return self

    def context(self, task: BaseTask) -> dict[str, Any]:
        context = super().context(task)

        context.update(
            {
                "parent_outputs": {
                    parent.id: parent.output.to_text() if parent.output else "" for parent in task.parents
                },
                "parents": {parent.id: parent for parent in task.parents},
                "children": {child.id: child for child in task.children},
            }
        )

        return context

    def to_graph(self) -> dict[str, set[str]]:
        graph: dict[str, set[str]] = {}

        for key_task in self.tasks:
            graph[key_task.id] = set()

            for value_task in self.tasks:
                if key_task.id in value_task.child_ids:
                    graph[key_task.id].add(value_task.id)

        return graph

    def order_tasks(self) -> list[BaseTask]:
        return [self.find_task(task_id) for task_id in TopologicalSorter(self.to_graph()).static_order()]

futures_executor: futures.Executor = field(default=Factory(lambda : futures.ThreadPoolExecutor()), kw_only=True) class-attribute instance-attribute

add_task(task)

Source code in griptape/griptape/structures/workflow.py 
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def add_task(self, task: BaseTask) -> BaseTask:
    task.preprocess(self)

    if self.output_task:
        self.output_task.child_ids.append(task.id)
        task.parent_ids.append(self.output_task.id)

    self.tasks.append(task)

    return task

context(task)

Source code in griptape/griptape/structures/workflow.py 
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def context(self, task: BaseTask) -> dict[str, Any]:
    context = super().context(task)

    context.update(
        {
            "parent_outputs": {
                parent.id: parent.output.to_text() if parent.output else "" for parent in task.parents
            },
            "parents": {parent.id: parent for parent in task.parents},
            "children": {child.id: child for child in task.children},
        }
    )

    return context

insert_task(parent_tasks, task, child_tasks, preserve_relationship=False)

Source code in griptape/griptape/structures/workflow.py 
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def insert_task(
    self,
    parent_tasks: list[BaseTask],
    task: BaseTask,
    child_tasks: list[BaseTask],
    preserve_relationship: bool = False,
) -> BaseTask:
    task.preprocess(self)

    for child_task in child_tasks:
        # Link the new task to the child task
        if child_task.id not in task.child_ids:
            task.child_ids.append(child_task.id)
        if task.id not in child_task.parent_ids:
            child_task.parent_ids.append(task.id)

    if not preserve_relationship:
        for parent_task in parent_tasks:
            for child_task in child_tasks:
                # Remove the old parent/child relationship
                if child_task.id in parent_task.child_ids:
                    parent_task.child_ids.remove(child_task.id)
                if parent_task.id in child_task.parent_ids:
                    child_task.parent_ids.remove(parent_task.id)

    for parent_task in parent_tasks:
        # Link the new task to the parent task
        if parent_task.id not in task.parent_ids:
            task.parent_ids.append(parent_task.id)
        if task.id not in parent_task.child_ids:
            parent_task.child_ids.append(task.id)

        parent_index = self.tasks.index(parent_task)
        self.tasks.insert(parent_index + 1, task)

    return task

insert_tasks(parent_tasks, tasks, child_tasks, preserve_relationship=False)

Insert tasks between parent and child tasks in the workflow.

Parameters:

Name Type Description Default
parent_tasks BaseTask | list[BaseTask]

The tasks that will be the parents of the new tasks.

 required
tasks BaseTask | list[BaseTask]

The tasks to insert between the parent and child tasks.

 required
child_tasks BaseTask | list[BaseTask]

The tasks that will be the children of the new tasks.

 required
preserve_relationship bool

Whether to preserve the parent/child relationship when inserting between parent and child tasks.

 False
Source code in griptape/griptape/structures/workflow.py 
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def insert_tasks(
    self,
    parent_tasks: BaseTask | list[BaseTask],
    tasks: BaseTask | list[BaseTask],
    child_tasks: BaseTask | list[BaseTask],
    preserve_relationship: bool = False,
) -> list[BaseTask]:
    """Insert tasks between parent and child tasks in the workflow.

    Args:
        parent_tasks: The tasks that will be the parents of the new tasks.
        tasks: The tasks to insert between the parent and child tasks.
        child_tasks: The tasks that will be the children of the new tasks.
        preserve_relationship: Whether to preserve the parent/child relationship when inserting between parent and child tasks.
    """

    if not isinstance(parent_tasks, list):
        parent_tasks = [parent_tasks]
    if not isinstance(tasks, list):
        tasks = [tasks]
    if not isinstance(child_tasks, list):
        child_tasks = [child_tasks]

    for task in tasks:
        self.insert_task(parent_tasks, task, child_tasks, preserve_relationship)

    return tasks

order_tasks()

Source code in griptape/griptape/structures/workflow.py 
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def order_tasks(self) -> list[BaseTask]:
    return [self.find_task(task_id) for task_id in TopologicalSorter(self.to_graph()).static_order()]

to_graph()

Source code in griptape/griptape/structures/workflow.py 
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def to_graph(self) -> dict[str, set[str]]:
    graph: dict[str, set[str]] = {}

    for key_task in self.tasks:
        graph[key_task.id] = set()

        for value_task in self.tasks:
            if key_task.id in value_task.child_ids:
                graph[key_task.id].add(value_task.id)

    return graph

try_run(*args)

Source code in griptape/griptape/structures/workflow.py 
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def try_run(self, *args) -> Workflow:
    self._execution_args = args
    ordered_tasks = self.order_tasks()
    exit_loop = False

    while not self.is_finished() and not exit_loop:
        futures_list = {}

        for task in ordered_tasks:
            if task.can_execute():
                future = self.futures_executor.submit(task.execute)
                futures_list[future] = task

        # Wait for all tasks to complete
        for future in futures.as_completed(futures_list):
            if isinstance(future.result(), ErrorArtifact):
                exit_loop = True

                break

    if self.conversation_memory:
        run = Run(input=self.input_task.input.to_text(), output=self.output_task.output.to_text())

        self.conversation_memory.add_run(run)

    self._execution_args = ()

    return self