Exemple #1
0
def pack_unpack_fp(repeats,
                   chunk_size=DEFAULT_CHUNK_SIZE,
                   progress=False,
                   metadata=None):
    in_fp, out_fp, dcmp_fp = StringIO(), StringIO(), StringIO()
    if progress:
        print("Creating test array")
    create_array_fp(repeats, in_fp, progress=progress)
    in_fp_size = in_fp.tell()
    if progress:
        print("Compressing")
    in_fp.seek(0)
    nchunks, chunk_size, last_chunk_size = \
            calculate_nchunks(in_fp_size, chunk_size)
    source = PlainFPSource(in_fp)
    sink = CompressedFPSink(out_fp)
    pack(source, sink, nchunks, chunk_size, last_chunk_size, metadata=metadata)
    out_fp.seek(0)
    if progress:
        print("Decompressing")
    source = CompressedFPSource(out_fp)
    sink = PlainFPSink(dcmp_fp)
    unpack(source, sink)
    if progress:
        print("Verifying")
    cmp_fp(in_fp, dcmp_fp)
    return source.metadata
Exemple #2
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def pack_unpack_fp(repeats, chunk_size=DEFAULT_CHUNK_SIZE,
                   progress=False, metadata=None):
    in_fp, out_fp, dcmp_fp = StringIO(), StringIO(), StringIO()
    if progress:
        print("Creating test array")
    create_array_fp(repeats, in_fp, progress=progress)
    in_fp_size = in_fp.tell()
    if progress:
        print("Compressing")
    in_fp.seek(0)
    nchunks, chunk_size, last_chunk_size = \
            calculate_nchunks(in_fp_size, chunk_size)
    source = PlainFPSource(in_fp)
    sink = CompressedFPSink(out_fp)
    pack(source, sink,
         nchunks, chunk_size, last_chunk_size,
         metadata=metadata)
    out_fp.seek(0)
    if progress:
        print("Decompressing")
    source = CompressedFPSource(out_fp)
    sink = PlainFPSink(dcmp_fp)
    unpack(source, sink)
    if progress:
        print("Verifying")
    cmp_fp(in_fp, dcmp_fp)
    return source.metadata
Exemple #3
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def test_append_single_chunk():
    orig, new, dcmp = StringIO(), StringIO(), StringIO()
    create_array_fp(1, new)
    new_size = new.tell()
    new.seek(0)
    chunking = calculate_nchunks(new_size, chunk_size=new_size)
    source = PlainFPSource(new)
    sink = CompressedFPSink(orig)
    pack(source, sink, *chunking)
    orig.seek(0)
    new.seek(0)

    # append a single chunk
    reset_append_fp(orig, new, new_size)
    bloscpack_header = reset_read_beginning(orig)[0]
    nt.assert_equal(bloscpack_header['nchunks'], 2)

    # append a large content, that amounts to two chunks
    new_content = new.read()
    new.seek(0)
    reset_append_fp(orig, StringIO(new_content * 2), new_size * 2)
    bloscpack_header = reset_read_beginning(orig)[0]
    nt.assert_equal(bloscpack_header['nchunks'], 4)

    # append half a chunk
    reset_append_fp(orig, StringIO(new_content[:len(new_content)]), new_size//2)
    bloscpack_header = reset_read_beginning(orig)[0]
    nt.assert_equal(bloscpack_header['nchunks'], 5)

    # append a few bytes
    reset_append_fp(orig, StringIO(new_content[:1023]), 1024)
    # make sure it is squashed into the lat chunk
    bloscpack_header = reset_read_beginning(orig)[0]
    nt.assert_equal(bloscpack_header['nchunks'], 5)
def test_append_into_last_chunk():
    # first create an array with a single chunk
    orig, new, dcmp = StringIO(), StringIO(), StringIO()
    create_array_fp(1, new)
    new_size = new.tell()
    new.seek(0)
    chunking = calculate_nchunks(new_size, chunk_size=new_size)
    source = PlainFPSource(new)
    sink = CompressedFPSink(orig)
    pack(source, sink, *chunking)
    orig.seek(0)
    new.seek(0)
    # append a few bytes, creating a new, smaller, last_chunk
    new_content = new.read()
    new.seek(0)
    nchunks = reset_append_fp(orig, StringIO(new_content[:1023]), 1023)
    bloscpack_header = reset_read_beginning(orig)[0]
    nt.assert_equal(nchunks, 1)
    nt.assert_equal(bloscpack_header['last_chunk'], 1023)
    # now append into that last chunk
    nchunks = reset_append_fp(orig, StringIO(new_content[:1023]), 1023)
    bloscpack_header = reset_read_beginning(orig)[0]
    nt.assert_equal(nchunks, 0)
    nt.assert_equal(bloscpack_header['last_chunk'], 2046)

    # now check by unpacking
    source = CompressedFPSource(orig)
    sink = PlainFPSink(dcmp)
    unpack(source, sink)
    dcmp.seek(0)
    new.seek(0)
    new_str = new.read()
    dcmp_str = dcmp.read()
    nt.assert_equal(len(dcmp_str), len(new_str) + 2046)
    nt.assert_equal(dcmp_str, new_str + new_str[:1023] * 2)
def test_append_single_chunk():
    orig, new, dcmp = StringIO(), StringIO(), StringIO()
    create_array_fp(1, new)
    new_size = new.tell()
    new.seek(0)
    chunking = calculate_nchunks(new_size, chunk_size=new_size)
    source = PlainFPSource(new)
    sink = CompressedFPSink(orig)
    pack(source, sink, *chunking)
    orig.seek(0)
    new.seek(0)

    # append a single chunk
    reset_append_fp(orig, new, new_size)
    bloscpack_header = reset_read_beginning(orig)[0]
    nt.assert_equal(bloscpack_header['nchunks'], 2)

    # append a large content, that amounts to two chunks
    new_content = new.read()
    new.seek(0)
    reset_append_fp(orig, StringIO(new_content * 2), new_size * 2)
    bloscpack_header = reset_read_beginning(orig)[0]
    nt.assert_equal(bloscpack_header['nchunks'], 4)

    # append half a chunk
    reset_append_fp(orig, StringIO(new_content[:len(new_content)]),
                    new_size // 2)
    bloscpack_header = reset_read_beginning(orig)[0]
    nt.assert_equal(bloscpack_header['nchunks'], 5)

    # append a few bytes
    reset_append_fp(orig, StringIO(new_content[:1023]), 1024)
    # make sure it is squashed into the lat chunk
    bloscpack_header = reset_read_beginning(orig)[0]
    nt.assert_equal(bloscpack_header['nchunks'], 5)
Exemple #6
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def pack_unpack_mem(repeats, chunk_size=DEFAULT_CHUNK_SIZE,
                    progress=False, metadata=None):
    in_fp, out_fp, dcmp_fp = StringIO(), StringIO(), StringIO()
    if progress:
        print("Creating test array")
    create_array_fp(repeats, in_fp, progress=progress)
    in_fp_size = in_fp.tell()
    if progress:
        print("Compressing")
    in_fp.seek(0)
    nchunks, chunk_size, last_chunk_size = \
            calculate_nchunks(in_fp_size, chunk_size)
    # let us play merry go round
    source = PlainFPSource(in_fp)
    sink = CompressedMemorySink()
    pack(source, sink, nchunks, chunk_size, last_chunk_size, metadata=metadata)
    source = CompressedMemorySource(sink)
    sink = PlainMemorySink()
    unpack(source, sink)
    nt.assert_equal(metadata, source.metadata)
    source = PlainMemorySource(sink.chunks)
    sink = CompressedFPSink(out_fp)
    pack(source, sink, nchunks, chunk_size, last_chunk_size, metadata=metadata)
    out_fp.seek(0)
    source = CompressedFPSource(out_fp)
    sink = PlainFPSink(dcmp_fp)
    unpack(source, sink)
    nt.assert_equal(metadata, source.metadata)
    in_fp.seek(0)
    dcmp_fp.seek(0)
    cmp_fp(in_fp, dcmp_fp)
    return source.metadata
Exemple #7
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def pack_unpack_mem(repeats,
                    chunk_size=DEFAULT_CHUNK_SIZE,
                    progress=False,
                    metadata=None):
    in_fp, out_fp, dcmp_fp = StringIO(), StringIO(), StringIO()
    if progress:
        print("Creating test array")
    create_array_fp(repeats, in_fp, progress=progress)
    in_fp_size = in_fp.tell()
    if progress:
        print("Compressing")
    in_fp.seek(0)
    nchunks, chunk_size, last_chunk_size = \
            calculate_nchunks(in_fp_size, chunk_size)
    # let us play merry go round
    source = PlainFPSource(in_fp)
    sink = CompressedMemorySink()
    pack(source, sink, nchunks, chunk_size, last_chunk_size, metadata=metadata)
    source = CompressedMemorySource(sink)
    sink = PlainMemorySink()
    unpack(source, sink)
    nt.assert_equal(metadata, source.metadata)
    source = PlainMemorySource(sink.chunks)
    sink = CompressedFPSink(out_fp)
    pack(source, sink, nchunks, chunk_size, last_chunk_size, metadata=metadata)
    out_fp.seek(0)
    source = CompressedFPSource(out_fp)
    sink = PlainFPSink(dcmp_fp)
    unpack(source, sink)
    nt.assert_equal(metadata, source.metadata)
    in_fp.seek(0)
    dcmp_fp.seek(0)
    cmp_fp(in_fp, dcmp_fp)
    return source.metadata
Exemple #8
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def test_append_into_last_chunk():
    # first create an array with a single chunk
    orig, new, dcmp = StringIO(), StringIO(), StringIO()
    create_array_fp(1, new)
    new_size = new.tell()
    new.seek(0)
    chunking = calculate_nchunks(new_size, chunk_size=new_size)
    source = PlainFPSource(new)
    sink = CompressedFPSink(orig)
    pack(source, sink, *chunking)
    orig.seek(0)
    new.seek(0)
    # append a few bytes, creating a new, smaller, last_chunk
    new_content = new.read()
    new.seek(0)
    nchunks = reset_append_fp(orig, StringIO(new_content[:1023]), 1023)
    bloscpack_header = reset_read_beginning(orig)[0]
    nt.assert_equal(nchunks, 1)
    nt.assert_equal(bloscpack_header['last_chunk'], 1023)
    # now append into that last chunk
    nchunks = reset_append_fp(orig, StringIO(new_content[:1023]), 1023)
    bloscpack_header = reset_read_beginning(orig)[0]
    nt.assert_equal(nchunks, 0)
    nt.assert_equal(bloscpack_header['last_chunk'], 2046)

    # now check by unpacking
    source = CompressedFPSource(orig)
    sink = PlainFPSink(dcmp)
    unpack(source, sink)
    dcmp.seek(0)
    new.seek(0)
    new_str = new.read()
    dcmp_str = dcmp.read()
    nt.assert_equal(len(dcmp_str), len(new_str) + 2046)
    nt.assert_equal(dcmp_str, new_str + new_str[:1023] * 2)
Exemple #9
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def test_disable_offsets():
    in_fp, out_fp, dcmp_fp = StringIO(), StringIO(), StringIO()
    create_array_fp(1, in_fp)
    in_fp_size = in_fp.tell()
    in_fp.seek(0)
    bloscpack_args = BloscpackArgs(offsets=False)
    source = PlainFPSource(in_fp)
    sink = CompressedFPSink(out_fp)
    pack(source, sink, *calculate_nchunks(in_fp_size), bloscpack_args=bloscpack_args)
    out_fp.seek(0)
    bloscpack_header, metadata, metadata_header, offsets = _read_beginning(out_fp)
    nt.assert_true(len(offsets) == 0)
Exemple #10
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def test_offsets():
    with create_tmp_files() as (tdir, in_file, out_file, dcmp_file):
        create_array(1, in_file)
        pack_file(in_file, out_file, chunk_size='2M')
        with open(out_file, 'r+b') as input_fp:
            bloscpack_header = _read_bloscpack_header(input_fp)
            total_entries = bloscpack_header.total_prospective_chunks
            offsets = _read_offsets(input_fp, bloscpack_header)
            # First chunks should start after header and offsets
            first = BLOSCPACK_HEADER_LENGTH + 8 * total_entries
            # We assume that the others are correct
            nt.assert_equal(offsets[0], first)
            nt.assert_equal([
                736, 368207, 633319, 902306, 1173771, 1419535, 1666981, 1913995
            ], offsets)
            # try to read the second header
            input_fp.seek(offsets[1], 0)
            blosc_header_raw = input_fp.read(BLOSC_HEADER_LENGTH)
            expected = {
                'versionlz': 1,
                'blocksize': 262144,
                'ctbytes': 265108,
                'version': 2,
                'flags': 1,
                'nbytes': 2097152,
                'typesize': 8
            }
            blosc_header = decode_blosc_header(blosc_header_raw)
            nt.assert_equal(expected, blosc_header)

    # now check the same thing again, but w/o any max_app_chunks
    input_fp, output_fp = StringIO(), StringIO()
    create_array_fp(1, input_fp)
    nchunks, chunk_size, last_chunk_size = \
            calculate_nchunks(input_fp.tell(), chunk_size='2M')
    input_fp.seek(0, 0)
    bloscpack_args = BloscpackArgs(max_app_chunks=0)
    source = PlainFPSource(input_fp)
    sink = CompressedFPSink(output_fp)
    pack(source,
         sink,
         nchunks,
         chunk_size,
         last_chunk_size,
         bloscpack_args=bloscpack_args)
    output_fp.seek(0, 0)
    bloscpack_header = _read_bloscpack_header(output_fp)
    nt.assert_equal(0, bloscpack_header.max_app_chunks)
    offsets = _read_offsets(output_fp, bloscpack_header)
    nt.assert_equal(
        [96, 367567, 632679, 901666, 1173131, 1418895, 1666341, 1913355],
        offsets)
Exemple #11
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def prep_array_for_append(blosc_args=BloscArgs(),
                          bloscpack_args=BloscpackArgs()):
    orig, new, dcmp = StringIO(), StringIO(), StringIO()
    create_array_fp(1, new)
    new_size = new.tell()
    new.seek(0)
    chunking = calculate_nchunks(new_size)
    source = PlainFPSource(new)
    sink = CompressedFPSink(orig)
    pack(source, sink, *chunking,
         blosc_args=blosc_args,
         bloscpack_args=bloscpack_args)
    orig.seek(0)
    new.seek(0)
    return orig, new, new_size, dcmp
Exemple #12
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def prep_array_for_append(blosc_args=BloscArgs(),
                          bloscpack_args=BloscpackArgs()):
    orig, new, dcmp = StringIO(), StringIO(), StringIO()
    create_array_fp(1, new)
    new_size = new.tell()
    new.seek(0)
    chunking = calculate_nchunks(new_size)
    source = PlainFPSource(new)
    sink = CompressedFPSink(orig)
    pack(source, sink, *chunking,
         blosc_args=blosc_args,
         bloscpack_args=bloscpack_args)
    orig.seek(0)
    new.seek(0)
    return orig, new, new_size, dcmp
Exemple #13
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def test_offsets():
    with create_tmp_files() as (tdir, in_file, out_file, dcmp_file):
        create_array(1, in_file)
        pack_file(in_file, out_file, chunk_size='2M')
        with open(out_file, 'r+b') as input_fp:
            bloscpack_header = _read_bloscpack_header(input_fp)
            total_entries = bloscpack_header.total_prospective_chunks
            offsets = _read_offsets(input_fp, bloscpack_header)
            # First chunks should start after header and offsets
            first = BLOSCPACK_HEADER_LENGTH + 8 * total_entries
            # We assume that the others are correct
            nt.assert_equal(offsets[0], first)
            nt.assert_equal([736, 368207, 633319, 902306, 1173771,
                             1419535, 1666981, 1913995],
                            offsets)
            # try to read the second header
            input_fp.seek(offsets[1], 0)
            blosc_header_raw = input_fp.read(BLOSC_HEADER_LENGTH)
            expected = {'versionlz': 1,
                        'blocksize': 262144,
                        'ctbytes':   265108,
                        'version':   2,
                        'flags':     1,
                        'nbytes':    2097152,
                        'typesize':  8}
            blosc_header = decode_blosc_header(blosc_header_raw)
            nt.assert_equal(expected, blosc_header)

    # now check the same thing again, but w/o any max_app_chunks
    input_fp, output_fp = StringIO(), StringIO()
    create_array_fp(1, input_fp)
    nchunks, chunk_size, last_chunk_size = \
            calculate_nchunks(input_fp.tell(), chunk_size='2M')
    input_fp.seek(0, 0)
    bloscpack_args = BloscpackArgs(max_app_chunks=0)
    source = PlainFPSource(input_fp)
    sink = CompressedFPSink(output_fp)
    pack(source, sink,
         nchunks, chunk_size, last_chunk_size,
         bloscpack_args=bloscpack_args
         )
    output_fp.seek(0, 0)
    bloscpack_header = _read_bloscpack_header(output_fp)
    nt.assert_equal(0, bloscpack_header.max_app_chunks)
    offsets = _read_offsets(output_fp, bloscpack_header)
    nt.assert_equal([96, 367567, 632679, 901666,
                     1173131, 1418895, 1666341, 1913355],
                    offsets)
Exemple #14
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def test_offsets():
    with create_tmp_files() as (tdir, in_file, out_file, dcmp_file):
        create_array(1, in_file)
        pack_file(in_file, out_file, chunk_size='2M')
        with open(out_file, 'r+b') as input_fp:
            bloscpack_header = _read_bloscpack_header(input_fp)
            total_entries = bloscpack_header.total_prospective_chunks
            offsets = _read_offsets(input_fp, bloscpack_header)
            # First chunks should start after header and offsets
            first = BLOSCPACK_HEADER_LENGTH + 8 * total_entries
            # We assume that the others are correct
            nt.assert_equal(offsets[0], first)
            nt.assert_equal([736, 418578, 736870, 1050327,
                             1363364, 1660766, 1959218, 2257703],
                            offsets)
            # try to read the second header
            input_fp.seek(offsets[1], 0)
            blosc_header_raw = input_fp.read(BLOSC_HEADER_LENGTH)
            expected = {'versionlz': 1,
                        'blocksize': 131072,
                        'ctbytes':   318288,
                        'version':   2,
                        'flags':     1,
                        'nbytes':    2097152,
                        'typesize':  8}
            blosc_header = decode_blosc_header(blosc_header_raw)
            nt.assert_equal(expected, blosc_header)

    # now check the same thing again, but w/o any max_app_chunks
    input_fp, output_fp = StringIO(), StringIO()
    create_array_fp(1, input_fp)
    nchunks, chunk_size, last_chunk_size = \
            calculate_nchunks(input_fp.tell(), chunk_size='2M')
    input_fp.seek(0, 0)
    bloscpack_args = BloscpackArgs(max_app_chunks=0)
    source = PlainFPSource(input_fp)
    sink = CompressedFPSink(output_fp)
    pack(source, sink,
         nchunks, chunk_size, last_chunk_size,
         bloscpack_args=bloscpack_args
         )
    output_fp.seek(0, 0)
    bloscpack_header = _read_bloscpack_header(output_fp)
    nt.assert_equal(0, bloscpack_header.max_app_chunks)
    offsets = _read_offsets(output_fp, bloscpack_header)
    nt.assert_equal([96, 417938, 736230, 1049687,
                     1362724, 1660126, 1958578, 2257063],
                    offsets)
Exemple #15
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def test_offsets():
    with create_tmp_files() as (tdir, in_file, out_file, dcmp_file):
        create_array(1, in_file)
        pack_file_to_file(in_file, out_file, chunk_size='2M')
        with open(out_file, 'r+b') as input_fp:
            bloscpack_header = _read_bloscpack_header(input_fp)
            total_entries = bloscpack_header.total_prospective_chunks
            offsets = _read_offsets(input_fp, bloscpack_header)
            # First chunks should start after header and offsets
            first = BLOSCPACK_HEADER_LENGTH + 8 * total_entries
            # We assume that the others are correct
            nt.assert_equal(offsets[0], first)
            nt.assert_equal(736, offsets[0])
            # try to read the second header
            input_fp.seek(offsets[1], 0)
            blosc_header_raw = input_fp.read(BLOSC_HEADER_LENGTH)
            expected = {
                'versionlz': 1,
                'version': 2,
                'flags': 1,
                'nbytes': 2097152,
                'typesize': 8
            }
            blosc_header = decode_blosc_header(blosc_header_raw)
            blosc_header_slice = dict(
                (k, blosc_header[k]) for k in expected.keys())
            nt.assert_equal(expected, blosc_header_slice)

    # now check the same thing again, but w/o any max_app_chunks
    input_fp, output_fp = StringIO(), StringIO()
    create_array_fp(1, input_fp)
    nchunks, chunk_size, last_chunk_size = \
            calculate_nchunks(input_fp.tell(), chunk_size='2M')
    input_fp.seek(0, 0)
    bloscpack_args = BloscpackArgs(max_app_chunks=0)
    source = PlainFPSource(input_fp)
    sink = CompressedFPSink(output_fp)
    pack(source,
         sink,
         nchunks,
         chunk_size,
         last_chunk_size,
         bloscpack_args=bloscpack_args)
    output_fp.seek(0, 0)
    bloscpack_header = _read_bloscpack_header(output_fp)
    nt.assert_equal(0, bloscpack_header.max_app_chunks)
    offsets = _read_offsets(output_fp, bloscpack_header)
    nt.assert_equal(96, offsets[0])
Exemple #16
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def test_disable_offsets():
    in_fp, out_fp, dcmp_fp = StringIO(), StringIO(), StringIO()
    create_array_fp(1, in_fp)
    in_fp_size = in_fp.tell()
    in_fp.seek(0)
    bloscpack_args = BloscpackArgs(offsets=False)
    source = PlainFPSource(in_fp)
    sink = CompressedFPSink(out_fp)
    pack(source,
         sink,
         *calculate_nchunks(in_fp_size),
         bloscpack_args=bloscpack_args)
    out_fp.seek(0)
    bloscpack_header, metadata, metadata_header, offsets = \
            _read_beginning(out_fp)
    nt.assert_true(len(offsets) == 0)
Exemple #17
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def test_offsets():
    with create_tmp_files() as (tdir, in_file, out_file, dcmp_file):
        create_array(1, in_file)
        pack_file(in_file, out_file, chunk_size='2M')
        with open(out_file, 'r+b') as input_fp:
            bloscpack_header = _read_bloscpack_header(input_fp)
            total_entries = bloscpack_header.total_prospective_chunks
            offsets = _read_offsets(input_fp, bloscpack_header)
            # First chunks should start after header and offsets
            first = BLOSCPACK_HEADER_LENGTH + 8 * total_entries
            # We assume that the others are correct
            nt.assert_equal(offsets[0], first)
            nt.assert_equal(736, offsets[0])
            # try to read the second header
            input_fp.seek(offsets[1], 0)
            blosc_header_raw = input_fp.read(BLOSC_HEADER_LENGTH)
            expected = {'versionlz': 1,
                        'version':   2,
                        'flags':     1,
                        'nbytes':    2097152,
                        'typesize':  8}
            blosc_header = decode_blosc_header(blosc_header_raw)
            blosc_header_slice = dict((k, blosc_header[k]) for k in expected.keys())
            nt.assert_equal(expected, blosc_header_slice)

    # now check the same thing again, but w/o any max_app_chunks
    input_fp, output_fp = StringIO(), StringIO()
    create_array_fp(1, input_fp)
    nchunks, chunk_size, last_chunk_size = \
            calculate_nchunks(input_fp.tell(), chunk_size='2M')
    input_fp.seek(0, 0)
    bloscpack_args = BloscpackArgs(max_app_chunks=0)
    source = PlainFPSource(input_fp)
    sink = CompressedFPSink(output_fp)
    pack(source, sink,
         nchunks, chunk_size, last_chunk_size,
         bloscpack_args=bloscpack_args
         )
    output_fp.seek(0, 0)
    bloscpack_header = _read_bloscpack_header(output_fp)
    nt.assert_equal(0, bloscpack_header.max_app_chunks)
    offsets = _read_offsets(output_fp, bloscpack_header)
    nt.assert_equal(96, offsets[0])
def test_append_metadata():
    orig, new, dcmp = StringIO(), StringIO(), StringIO()
    create_array_fp(1, new)
    new_size = new.tell()
    new.seek(0)

    metadata = {"dtype": "float64", "shape": [1024], "others": []}
    chunking = calculate_nchunks(new_size, chunk_size=new_size)
    source = PlainFPSource(new)
    sink = CompressedFPSink(orig)
    pack(source, sink, *chunking, metadata=metadata)
    orig.seek(0)
    new.seek(0)
    reset_append_fp(orig, new, new_size)
    source = CompressedFPSource(orig)
    sink = PlainFPSink(dcmp)
    ans = unpack(source, sink)
    print(ans)
    dcmp.seek(0)
    new.seek(0)
    new_str = new.read()
    dcmp_str = dcmp.read()
    nt.assert_equal(len(dcmp_str), len(new_str) * 2)
    nt.assert_equal(dcmp_str, new_str * 2)
Exemple #19
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def test_append_metadata():
    orig, new, dcmp = StringIO(), StringIO(), StringIO()
    create_array_fp(1, new)
    new_size = new.tell()
    new.seek(0)

    metadata = {"dtype": "float64", "shape": [1024], "others": []}
    chunking = calculate_nchunks(new_size, chunk_size=new_size)
    source = PlainFPSource(new)
    sink = CompressedFPSink(orig)
    pack(source, sink, *chunking, metadata=metadata)
    orig.seek(0)
    new.seek(0)
    reset_append_fp(orig, new, new_size)
    source = CompressedFPSource(orig)
    sink = PlainFPSink(dcmp)
    ans = unpack(source, sink)
    print(ans)
    dcmp.seek(0)
    new.seek(0)
    new_str = new.read()
    dcmp_str = dcmp.read()
    nt.assert_equal(len(dcmp_str), len(new_str) * 2)
    nt.assert_equal(dcmp_str, new_str * 2)