def _get_system_ids_dataframe_from_timeseries(timeseries_filename: str=TIMESERIES_FILENAME) -> pd.DataFrame:
    'Get all the PV system IDs from the timeseries file'
    ds = xr.open_dataset(timeseries_filename)
    system_ids = [int(x) for x in list(ds.data_vars.keys())]
    df = pd.DataFrame({'system_id': system_ids})
    df = df.set_index('system_id')
    return df
Get all the PV system IDs from the timeseries file
def _get_system_ids_dataframe_from_timeseries(timeseries_filename: str=TIMESERIES_FILENAME) -> pd.DataFrame:
    
    ds = xr.open_dataset(timeseries_filename)
    system_ids = [int(x) for x in list(ds.data_vars.keys())]
    df = pd.DataFrame({'system_id': system_ids})
    df = df.set_index('system_id')
    return df