human
Solve the following python programming problem given the following code:
@ pytest.fixture 
def tasks(self, request) : 
    self.cleaned = [] 
    def myclean(name) : 
        self.cleaned.append (name) 
return [Task ('t1', None, task_dep = ['t2'], clean = [(myclean, ('t1',))]), Task ('t2', None, clean = [(request, ('t2',))]), Task ('t3', None, task_dep = ['t3:a'], has_subtask = True, clean = [(myclean, ('t3',))]), Task ('t3:a', None, clean = [(myclean, ('t3:a',))], is_subtask = True), Task ('t4', None, task_dep = ['t1'], clean = [(myclean, ('t4',))])] 

    
    

    Fix the buggy line: return [Task ('t1', None, task_dep = ['t2'], clean = [(myclean, ('t1',))]), Task ('t2', None, clean = [(request, ('t2',))]), Task ('t3', None, task_dep = ['t3:a'], has_subtask = True, clean = [(myclean, ('t3',))]), Task ('t3:a', None, clean = [(myclean, ('t3:a',))], is_subtask = True), Task ('t4', None, task_dep = ['t1'], clean = [(myclean, ('t4',))])]
assistant
#Here is Python program to fix the buggy line: return [Task ('t1', None, task_dep = ['t2'], clean = [(myclean, ('t1',))]), Task ('t2', None, clean = [(request, ('t2',))]), Task ('t3', None, task_dep = ['t3:a'], has_subtask = True, clean = [(myclean, ('t3',))]), Task ('t3:a', None, clean = [(myclean, ('t3:a',))], is_subtask = True), Task ('t4', None, task_dep = ['t1'], clean = [(myclean, ('t4',))])]
.

return [Task ('t1', None, task_dep = ['t2'], clean = [(myclean, ('t1',))]), Task ('t2', None, clean = [(myclean, ('t2',))]), Task ('t3', None, task_dep = ['t3:a'], has_subtask = True, clean = [(myclean, ('t3',))]), Task ('t3:a', None, clean = [(myclean, ('t3:a',))], is_subtask = True), Task ('t4', None, task_dep = ['t1'], clean = [(myclean, ('t4',))])]