code: def _get_key_redis_key(bank, key):
      '''
      Return the Redis key given the bank name and the key name.
      '''
      opts = _get_redis_keys_opts()
      return '{prefix}{separator}{bank}/{key}'.format(
          prefix=opts['key_prefix'],
          separator=opts['separator'],
          bank=bank,
          key=key
      f _get_key_redis_key(bank, key):
      '''
      Return the Redis key given the bank name and the key name.
      '''
      opts = _get_redis_keys_opts()
      return '{prefix}{separator}{bank}/{key}'.format(
          prefix=opts['key_prefix'],
          separator=opts['separator'],
          bank=bank,
          key=key
      )
docs: Return the Redis key given the bank name and the key name.