docs: def add_splash_ids(splash_mapping_file_pth, conn, db_type='sqlite'):
      """ Add splash ids to database (in case stored in a different file to the msp files like for MoNA)
  
      Example:
          >>> from msp2db.db import get_connection
          >>> from msp2db.parse import add_splash_ids
          >>> conn = get_connection('sqlite', 'library.db')
          >>> add_splash_ids('splash_mapping_file.csv', conn, db_type='sqlite')
  
  
      Args:
          splash_mapping_file_pth (str): Path to the splash mapping file (needs to be csv format and have no headers,
                                         should contain two columns. The first the accession number the second the splash.
                                         e.g. AU100601, splash10-0a4i-1900000000-d2bc1c887f6f99ed0f74 \n
  
      """
      # get dictionary of accession and library_spectra_meta_id
      cursor = conn.cursor()
      cursor.execute("SELECT id, accession FROM library_spectra_meta")
  
      accession_d = {row[1]: row[0] for row in cursor}
  
      if db_type == 'sqlite':
          type_sign = '?'
      else:
          type_sign = '%s'
  
      rows = []
      c = 0
      # loop through splash mapping file
      with open(splash_mapping_file_pth, "r") as f:
  
          for line in f:
              c+=1
              line = line.rstrip()
              line_l = line.split(',')
  
              accession = line_l[0]
              splash = line_l[1]
              try:
                  aid = accession_d[accession]
              except KeyError as e:
                  print("can't find accession {}".format(accession))
                  continue
  
              row = (splash, aid)
              rows.append(row)
  
              if c > 200:
                  print(row)
                  cursor.executemany("UPDATE library_spectra_meta SET splash = {t} WHERE id = {t} ".format(t=type_sign), rows)
                  conn.commit()
                  rows = []
                  c = 0
  
      cursor.executemany("UPDATE library_spectra_meta SET splash = {t} WHERE id = {t} ".format(t=type_sign), rows)
      conn.commit()