from airflow.models import Variable

# Common (Not-so-nice way)
# 3 DB connections when the file is parsed
var1 = Variable.get("var1")
var2 = Variable.get("var2")
var3 = Variable.get("var3")

# Recommended Way
# Just 1 Database call
dag_config = Variable.get("dag1_config", deserialize_json=True)
dag_config["var1"]
dag_config["var2"]
dag_config["var3"]

# You can directly use it Templated arguments {{ var.json.my_var.path }}
bash_task = BashOperator(
    task_id="bash_task",
    bash_command='{{ var.json.dag1_config.var1 }} ',
    dag=dag,
)