DolphinScheduler/dolphinscheduler-python/pydolphinscheduler/examples/task_dependent_example.py

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# [start workflow_declare]
r"""
A example workflow for task dependent.

This example will create two workflows named `task_dependent` and `task_dependent_external`.
`task_dependent` is true workflow define and run task dependent, while `task_dependent_external`
define outside workflow and task from dependent.

After this script submit, we would get workflow as below:

task_dependent_external:

task_1
task_2
task_3

task_dependent:

task_dependent(this task dependent on task_dependent_external.task_1 and task_dependent_external.task_2).
"""
from pydolphinscheduler.constants import ProcessDefinitionDefault
from pydolphinscheduler.core.process_definition import ProcessDefinition
from pydolphinscheduler.tasks.dependent import And, Dependent, DependentItem, Or
from pydolphinscheduler.tasks.shell import Shell

with ProcessDefinition(
    name="task_dependent_external",
    tenant="tenant_exists",
) as pd:
    task_1 = Shell(name="task_1", command="echo task 1")
    task_2 = Shell(name="task_2", command="echo task 2")
    task_3 = Shell(name="task_3", command="echo task 3")
    pd.submit()

with ProcessDefinition(
    name="task_dependent_example",
    tenant="tenant_exists",
) as pd:
    task = Dependent(
        name="task_dependent",
        dependence=And(
            Or(
                DependentItem(
                    project_name=ProcessDefinitionDefault.PROJECT,
                    process_definition_name="task_dependent_external",
                    dependent_task_name="task_1",
                ),
                DependentItem(
                    project_name=ProcessDefinitionDefault.PROJECT,
                    process_definition_name="task_dependent_external",
                    dependent_task_name="task_2",
                ),
            )
        ),
    )
    pd.submit()
# [end workflow_declare]