Hi all! Could anyone explain please, if I register flow with some parameters, for example: a=10. And in the flow i have:

with Flow('flow_name') as flow:
  a = prefect.Parameter('a', 'required'=True)
  <http://logger.info|logger.info>(a)

how can i get the parameter value to be used? So i want

a

to be 1, but I get:

a = <Parameter: a>

Im running the flow in the following way:

prefect_client.graphql(query= """
                                mutation{
                                    create_flow_run(input: { flow_id: %s , parameters: %s}) {
                                    id
                                    }
                                }
                                """ % (train_flow_id, json.dumps(flow_params).replace('"', '\"'))
                                )

where flow_params is a dictionary

here is an example:

from prefect import task, Flow, Parameter


@task(log_stdout=True)
def hello_world(name):
    print(f"hello {name}")


with Flow("mini.example") as flow:
    name = Parameter("name", default="Aleksandr")
    hw = hello_world(name)

if __name__ == "__main__":
    flow.run()

So to retrieve the parameter, it should be run in the task?

you can pass the value to another task as data dependency, correct. Have a look at this documentation page: https://docs.prefect.io/core/concepts/parameters.html

Thank you, have seen it, was thinking if there is a method to retrieve a parameter without another task, for e.g. having a parameter class method: param.get_value(). But i get it, thank you!