ephraimbuddy commented on pull request #16823:
URL: https://github.com/apache/airflow/pull/16823#issuecomment-874271273
Tested with these two dags:
```
from airflow import DAG
from airflow.utils.dates import days_ago
from airflow.operators.python import PythonOperator
dag = DAG(
"example_xcom",
schedule_interval="@once",
start_date=days_ago(2)
)
def push_xcom(ti):
# returning a value pushes xcom
return [3,4,5,6]
def pull_xcom(ti):
# Pull an xcom
xcom = ti.xcom_pull(task_ids='push_xcom', key='mykey')
print("Xcom pulled: ", xcom)
with dag:
task1 = PythonOperator(
task_id="push_xcom",
python_callable=push_xcom,
xcom_key='mykey',
)
task2 = PythonOperator(
task_id="pull_xcom",
python_callable=pull_xcom
)
task1 >> task2
```
```
from airflow import DAG
from airflow.utils.dates import days_ago
dag = DAG(dag_id="test-xcom-key", schedule_interval="@once",
start_date=days_ago(2))
@dag.task(xcom_key="mykey")
def push_xcom():
return {"mydata":[3,4,5,6]}
@dag.task()
def push_another_xcom(data):
print(data)
return {'mydata':"mydata"}
push_another_xcom(push_xcom())
```
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