human
Solve the following python programming problem given the following code:
@ mock.patch ('changes.config.queue.delay') 
@ mock.patch.object (HistoricalImmutableStep, 'get_implementation') 
@ responses.activate 
def test_in_progress(self, get_implementation, queue_delay) : 
    responses.add (responses.GET, SyncJobStepTest.ARTIFACTSTORE_REQUEST_RE, body = '', status = 404) 
    implementation = mock.Mock () 
    get_implementation.return_value = implementation 
    def mark_in_progress(step) : 
        step.status = Status.in_progress 
project = self.create_project () 
    build = self.create_build (project = project) 
    job = self.create_job (build = build) 
    plan = self.create_plan (project) 
    self.create_step (plan, implementation = 'test', order = 0) 
    self.create_job_plan (job, plan) 
    phase = self.create_jobphase (job) 
    step = self.create_jobstep (phase) 
    task = self.create_task (parent_id = job.id, task_id = step.id, task_name = 'sync_job_step') 
    db.session.add (ItemStat (item_id = job.id, name = 'tests_missing', value = 1)) 
    db.session.commit () 
    implementation.update_step.side_effect = mark_in_progress 
    sync_job_step (step_id = step.id.hex, task_id = step.id.hex, parent_task_id = job.id.hex) 
    implementation.update_step.assert_called_once_with (step = step) 
    db.session.expire (step) 
    db.session.expire (task) 
    step = JobStep.query.get (job.id) 
    assert (step.status == Status.in_progress) 
    task = Task.query.get (task.id) 
    assert (task.status == Status.in_progress) 
    queue_delay.assert_any_call ('sync_job_step', kwargs = { 
        'step_id' : step.id.hex, 
        'task_id' : step.id.hex, 
        'parent_task_id' : job.id.hex, 
}, countdown = 5) 

    
    

    Fix the buggy line: step = JobStep.query.get (job.id)
assistant
#Here is Python code to fix the buggy line: step = JobStep.

step = JobStep.query.get (step.id)