from airflow import DAG
from airflow.models import Variable
from airflow.operators.python_operator import PythonOperator
from airflow.utils.dates import days_ago
from jinja2 import Template

dag = DAG(
    dag_id='example_dag',
    start_date=days_ago(1),
    schedule_interval=None
)

def my_python_function(**kwargs):
    template = Template("Hello, {{ name }}!")
    rendered_template = template.render(name='Airflow')
    print(rendered_template)

task = PythonOperator(
    task_id='my_task',
    python_callable=my_python_function,
    provide_context=True,
    dag=dag
)