text: """Linelist-related functions"""
  
  import pandas as pd
  
  from savsnet_geoaggregate import config
  
  
  def load_linelist(linelist):
      df = (
          pd.read_csv(
              linelist,
              parse_dates=[config.LL_COLUMN_DATE],
              index_col=[config.LL_COLUMN_DATE],
              usecols=config.LL_COLUMNS,
          )
          .sort_index()
          .rename(
              columns={
                  config.LL_COLUMN_LATITUDE: "latitude",
                  config.LL_COLUMN_LONGITUDE: "longitude",
              }
          )
      )
      df.index.name = "date"
      return df
  