from airflow import DAG
from airflow.operators.python import PythonOperator
from datetime import datetime

def hello():
    print("hello world")

with DAG(
    dag_id="test_simple",
    start_date=datetime(2026, 3, 1),
    schedule_interval="@daily",
    catchup=False
) as dag:
    PythonOperator(task_id="hello", python_callable=hello)