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