from prefect import Flow, task

@task
def mytask(x):
    return x+1

with Flow("test") as flow:
    mytask.map({"a": 1, "b": 2})

flow.run()

from prefect import Flow, task

def generate_task_run_name(dict_val, **kwargs):
    return "something" + str(dict_val['a'])

@task(task_run_name=generate_task_run_name)
def mytask(dict_val):
    return dict_val["b"]+1

with Flow("test") as flow:
    mytask.map([{"a": 1, "b": 2}, {"a": 3, "b": 4}])

flow.register("general_assembly")