import cdstoolbox as ct

@ct.application(title='Download data')
@ct.output.download()
def download_application():
    data = ct.catalogue.retrieve(
        'reanalysis-era5-single-levels',
        {
            'product_type': 'reanalysis',
            'variable': [
                '100m_u_component_of_wind', '100m_v_component_of_wind', 'surface_pressure',
            ],
            'year': '2015',
            'month': '01',
            'day': [
                '01', '02', '03',
                '04', '05', '06',
                '07', '08', '09',
                '10', '11', '12',
                '13', '14', '15',
                '16', '17', '18',
                '19', '20', '21',
                '22',
            ],
            'time': [
                '00:00', '01:00', '02:00',
                '03:00', '04:00', '05:00',
                '06:00', '07:00', '08:00',
                '09:00', '10:00', '11:00',
                '12:00', '13:00', '14:00',
                '15:00', '16:00', '17:00',
                '18:00', '19:00', '20:00',
                '21:00', '22:00', '23:00',
            ],
            'area': [
                90, -180, 0,
                180,
            ],
        }
    )
    return data