Felix-neko opened a new issue, #50752:
URL: https://github.com/apache/airflow/issues/50752
### Apache Airflow version
3.0.1
### If "Other Airflow 2 version" selected, which one?
_No response_
### What happened?
Hi folks! And thank you for your great product.
I want to run some `PythonVirtualenvOperator` that has `pendulum<3` in its
requirements.
And I'm getting the following error:
```
[2025-05-18T22:12:54.135+0300] {process_utils.py:196} INFO - obj =
StockUnpickler.load(self)
[2025-05-18T22:12:54.135+0300] {process_utils.py:196} INFO - AttributeError:
type object 'Timezone' has no attribute '_unpickle'
```
### What you think should happen instead?
_No response_
### How to reproduce
Here's a a complete script to reproduce the error:
```
from datetime import datetime, timedelta
import pendulum
from airflow import DAG
from airflow.providers.standard.operators.python import PythonOperator,
PythonVirtualenvOperator
# Define the DAG
with DAG(dag_id="example_virtualenv_dag", start_date=datetime(2025, 5, 1),
schedule=None, catchup=False) as dag:
# A simple Python callable to be run in the virtualenv
def generate_message(*args, **kwargs):
return "Hello from virtualenv!"
# Task: runs `generate_message` inside a fresh virtual environment
virtualenv_task = PythonVirtualenvOperator(
task_id="virtualenv_task",
python_version="3.9",
python_callable=generate_message,
requirements=[
"pendulum<3"
], # This will cause an error: AttributeError: type object
'Timezone' has no attribute '_unpickle'
system_site_packages=False,
expect_airflow=False,
serializer="dill",
)
if __name__ == "__main__":
dag_run = dag.test(
logical_date=pendulum.datetime(2025, 5, 3)
) # Runs all tasks locally without a scheduler
:contentReference[oaicite:2]{index=2}
print("STATE: ", dag_run.state)
```
### Operating System
Ubuntu 24.04
### Versions of Apache Airflow Providers
apache-airflow-providers-common-compat==1.7.0
apache-airflow-providers-common-io==1.6.0
apache-airflow-providers-common-sql==1.27.1
apache-airflow-providers-smtp==2.1.0
apache-airflow-providers-standard==1.2.0
### Deployment
Official Apache Airflow Helm Chart
### Deployment details
_No response_
### Anything else?
_No response_
### Are you willing to submit PR?
- [ ] Yes I am willing to submit a PR!
### Code of Conduct
- [x] I agree to follow this project's [Code of
Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)
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