How to use the msgpack.dump function in msgpack

def post(self, *args, **kw):
        self.requests.append((args, kw))
        io = BytesIO()
        for chunk in self.data:
            msgpack.dump(chunk, io)

        io.seek(0, 0)

        class Response:
            raw = io
            ok = True

        return Response

def convert(infile, outfile):
    if not outfile:
        ext = infile.split('.')[-1]
        outfile = '%s%s' % (infile[:-len(ext)-1], EXT)

    print('%s > %s' % (infile, outfile))

    print('reading in JSON')
    with open(infile) as op:
        data = json.load(op)

    print('writing to msgpack')
    with open(outfile, 'wb') as op:
        msgpack.dump(data, op)

params[i] = param
        logger.debug('Saving alpha with parameter: {!r}'.format(param))
        if ftype == 'csv':
            alpha.to_csv(os.path.join(outdir, 'alpha'+str(i)))
        elif ftype == 'pickle':
            alpha.to_pickle(os.path.join(outdir, 'alpha'+str(i)))
        elif ftype == 'msgpack':
            alpha.to_msgpack(os.path.join(outdir, 'alpha'+str(i)))

    with open(os.path.join(outdir, 'params.json'), 'w') as file:
        if ftype == 'csv':
            json.dump(params, file)
        elif ftype == 'pickle':
            cPickle.dump(params, file)
        elif ftype == 'msgpack':
            msgpack.dump(params, file)

'vocab_ent': vocab_ent,
        'embedding': embeddings.tolist(),
        'wv_cased': args.wv_cased,
    }
    with open('SQuAD/meta.msgpack', 'wb') as f:
        msgpack.dump(meta, f)
    result = {
        'train': train,
        'dev': dev
    }
    # train: id, context_id, context_features, tag_id, ent_id,
    #        question_id, context, context_token_span, answer_start, answer_end
    # dev:   id, context_id, context_features, tag_id, ent_id,
    #        question_id, context, context_token_span, answer
    with open('SQuAD/data.msgpack', 'wb') as f:
        msgpack.dump(result, f)
    if args.sample_size:
        sample = {
            'train': train[:args.sample_size],
            'dev': dev[:args.sample_size]
        }
        with open('SQuAD/sample.msgpack', 'wb') as f:
            msgpack.dump(sample, f)
    log.info('saved to disk.')

nscf=True,
        kpts=atoms.info['kpts'] * [2, 2, 1],
        DeltaE=0.01,
        slab=True,
        Emin=-40,
        Emax=40,
        tetrahedra=False,
        sigma=0.2)

    dos = list(dos)
    array_to_list(dos)

    # If outfile, write a MessagePack encoded version to disk
    if out_file:
        with open(out_file, 'w') as f:
            msgpack.dump(dos, f)

    # Return a BSON friendly version
    return json.dumps(dos, encoding='utf-8')

def dump(self, f):
      values = list(map(lambda x: x[1], self.get()))
      msgpack.dump(values, f)

def __init__(self, persist_path=None):
        """
        persist_path: if provided, perform serialization to/from disk to this path
        """
        self.persist_path = persist_path
        self.dump = partial(msgpack.dump, default=msgpack_serialize)
        self.load = partial(msgpack.load, ext_hook=msgpack_deserialize)
        self.dict = {}

elif args["--remove"]:
        for url in urls:
            remove(database, url, tags)
        #msgpack.dump(database, open(d_file, 'wb'))

    elif args["--tags"]:
        result = list(list_every_tags(database))
        result.sort()
        for tag in result:
            print(tag)

    elif args["TAG"]:
        for url in urls:
            add(database, url, tags)
        msgpack.dump(database, open(d_file, 'wb'))

    else:
        for url in urls:
            for tag in database[url]:
                print(tag)

def serializeToFile(self, fname, annotations):
        """
        Overwritten to write Msgpack files.
        """
        # TODO make all image filenames relative to the label file
        import msgpack
        f = open(fname, "w")
        msgpack.dump(annotations, f)

self.history = msgpack.load(file(filename, 'rb'), raw=False)
            except:
                #
                # The history file might still be in pickle format, we read
                # it and migrate to msgpack
                #
                try:
                    self.history = cPickle.load(file(filename, 'rb'))
                except:
                    #
                    # Well... the file is completely broken, just write an
                    # empty string to it using msgpack to have a nicer run
                    # the next time the user executes the GUI
                    #
                    self.history = {}
                    msgpack.dump({}, file(filename, 'wb'))
                else:
                    #
                    # We were able to read using pickle, migrate the file to
                    # msgpack to prevent deserialization issues
                    # https://github.com/andresriancho/w3af/issues/17807
                    #
                    msgpack.dump(self.history, file(filename, 'wb'))