How to log from a Workflow in Python

You can log from a Workflow using Python's standard library, by importing the logging module import logging.

Set your logging configuration to a level you want to expose logs to. The following example sets the logging information level to INFO.

logging.basicConfig(level=logging.INFO)

Then in your Workflow, set your logger and level on the Workflow. The following example logs the Workflow.

@workflow.defn
class SayHelloWorkflow:
    @workflow.run
    async def run(self, name: str) -> str:
        workflow.logger.info(f"Running workflow with parameter {name}")
        return await workflow.execute_activity(
            your_activity, name, start_to_close_timeout=timedelta(seconds=10)
        )

The following is an example output:

INFO:temporalio.workflow:Running workflow with parameter Temporal ({'attempt': 1, 'your-custom-namespace': 'default', 'run_id': 'your-run-id', 'task_queue': 'your-task-queue', 'workflow_id': 'your-workflow-id', 'workflow_type': 'SayHelloWorkflow'})

note

Logs are skipped during replay by default.