User Guide: first example is incomplete / incorrect

[andre-merzky]

The code (here)[] won't run as the async call cannot happen outside of a function. This code should be complete:

#!/usr/bin/env python3

import os
import asyncio

from radical.asyncflow import WorkflowEngine
from radical.asyncflow import RadicalExecutionBackend

from rose.al.active_learner import SequentialActiveLearner

async def main():
    engine = await RadicalExecutionBackend(
        {'runtime': 30,
        'resource': 'local.localhost'})

    asyncflow = await WorkflowEngine.create(engine)

    acl = SequentialActiveLearner(asyncflow)

    [...]

asyncio.run(main())

I should add that none of the examples under examples/ runs out of the box, mostly because of something like this:

radical.asyncflow.errors.DependencyFailureError: Cannot execute 'check_mse' due to dependency failure

which seems not to resolve the (existing) python scripts.