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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _do_private_mode(FetcherClass, services, kwargs, random_wait_seconds, timeout, verbose):
 """ Private mode is only applicable to address_balance, unspent_outputs, and historical_transactions. There will always be a list for the `addresses` argument. Each address goes to a random service. Also a random delay is performed before the external fetch for improved privacy. """

    addresses = kwargs.pop('addresses')
    results = {}

    with futures.ThreadPoolExecutor(max_workers=len(addresses)) as executor:
        fetches = {}
        for address in addresses:
            k = kwargs
            k['address'] = address
            random.shuffle(services)
            srv = FetcherClass(
                services=services, verbose=verbose, timeout=timeout or 5.0,
                random_wait_seconds=random_wait_seconds
            )
            # address is returned because balance needs to be returned
            # attached to the address. Other methods (get_transaction, unspent_outputs, etc)
            # do not need to be indexed by address. (upstream they are stripped out)
            fetches[executor.submit(srv.action, **k)] = (srv, address)

        to_iterate = futures.as_completed(fetches)

        for future in to_iterate:
            service, address = fetches[future]
            results[address] = future.result()

    return results