human
Complete the below
@pytest.fixture(scope=u'function')
def remove_output_folder(request):

    ''''Remove the output folder in case it exists on disk.'
    '''
assistant
#Here is the Python program you requested.
    def finalizer_remove_output_folder():
        if os.path.exists(u'output_folder'):
            utils.rmtree(u'output_folder')
    request.addfinalizer(finalizer_remove_output_folder)