code: def get_huc8(prefix):
      
      if not prefix.isdigit():
          # Look up hucs by name
          name = prefix
          prefix = None
          for row in hucs:
              if row.basin.lower() == name.lower():
                  # Use most general huc if two have the same name
                  if prefix is None or len(row.huc) < len(prefix):
                      prefix = row.huc
  
      if prefix is None:
          return []
  
      huc8s = []
      for row in hucs:
          # Return all 8-digit hucs with given prefix
          if len(row.huc) == 8 and row.huc.startswith(prefix):
              huc8s.append(row.huc)
      return huc8s
docs: Return all HUC8s matching the given prefix (e.g. 1801) or basin name
      (e.g. Klamath)