docs: def minimum(station_code):
      """Extreme Minimum Design Temperature for a location.
  
      Degrees in Celcius
  
      Args:
          station_code (str): Weather Station Code
  
      Returns:
          float degrees Celcius
      """
      temp = None
      fin = None
      try:
          fin = open('%s/%s' % (env.WEATHER_DATA_PATH,
                                _basename(station_code, 'ddy')))
      except IOError:
          logger.info("File not found")
          download_extract(_eere_url(station_code))
          fin = open('%s/%s' % (env.WEATHER_DATA_PATH,
                                _basename(station_code, 'ddy')))
      for line in fin:
          value = re.search('Max Drybulb=(-?\\d+\\.\\d*)', line)
          if value:
              temp = float(value.groups()[0])
      if not temp:
          try:
              fin = open('%s/%s' % (env.WEATHER_DATA_PATH,
                                    _basename(station_code, 'stat')))
              for line in fin:
                  if line.find('Minimum Dry Bulb') is not -1:
                      return float(line[37:-1].split('\xb0')[0])
          except IOError:
              pass
      if temp:
          return temp
      else:
          raise Exception("Error: Minimum Temperature not found")