nwm_data.py 文件源码

def time_from_dataset(nc_dataset):
    if 'time' in nc_dataset.variables:
        var = nc_dataset.variables['time']
        units = var.units
        val = var[0]
        date = num2date(val, units)       
    elif 'model_output_valid_time' in nc_dataset.ncattrs():
        date = date_parser.parse(
            nc_dataset.model_output_valid_time.replace('_', ' '))
    else:
        raise ValueError('Could not find model output time in netCDF dataset.')
    if date.tzinfo is None:
        date = date.replace(tzinfo=pytz.utc)
    return date