airflow/example_dags/example_dynamic_task_mapping.py

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"""Example DAG demonstrating the usage of dynamic task mapping."""
from __future__ import annotations

from datetime import datetime

from airflow import DAG
from airflow.decorators import task

with DAG(dag_id="example_dynamic_task_mapping", start_date=datetime(2022, 3, 4)) as dag:

    @task
    def add_one(x: int):
        return x + 1

    @task
    def sum_it(values):
        total = sum(values)
        print(f"Total was {total}")

    added_values = add_one.expand(x=[1, 2, 3])
    sum_it(added_values)