def testCompressIO(self):
if not np:
return
import pyarrow
from numpy.testing import assert_array_equal
data = np.random.random((1000, 100))
serialized = pyarrow.serialize(data).to_buffer()
bio = BytesIO()
reader = dataserializer.CompressBufferReader(
pyarrow.py_buffer(serialized), dataserializer.COMPRESS_FLAG_LZ4)
while True:
block = reader.read(128)
if not block:
break
bio.write(block)
compressed = bio.getvalue()
assert_array_equal(data, dataserializer.loads(compressed))
data_sink = bytearray(len(serialized))
compressed_mv = memoryview(compressed)
writer = dataserializer.DecompressBufferWriter(
pyarrow.py_buffer(data_sink))
pos = 0
while pos < len(compressed):
endpos = min(pos + 128, len(compressed))
writer.write(compressed_mv[pos:endpos])
pos = endpos
assert_array_equal(data, pyarrow.deserialize(data_sink))
def testDataSerialize(self):
try:
import numpy as np
from numpy.testing import assert_array_equal
except ImportError:
np = None
try:
import scipy.sparse as sps
except ImportError:
sps = None
if np:
array = np.random.rand(1000, 100)
assert_array_equal(array, dataserializer.loads(dataserializer.dumps(array)))
assert_array_equal(array, dataserializer.loads(dataserializer.dumps(
array, compress=dataserializer.COMPRESS_FLAG_LZ4)))
array = np.random.rand(1000, 100)
assert_array_equal(array, dataserializer.load(BytesIO(dataserializer.dumps(array))))
assert_array_equal(array, dataserializer.load(BytesIO(dataserializer.dumps(
array, compress=dataserializer.COMPRESS_FLAG_LZ4))))
array = np.random.rand(1000, 100).T # test non c-contiguous
assert_array_equal(array, dataserializer.loads(dataserializer.dumps(array)))
assert_array_equal(array, dataserializer.loads(dataserializer.dumps(
array, compress=dataserializer.COMPRESS_FLAG_LZ4)))
array = np.float64(0.2345)
assert_array_equal(array, dataserializer.loads(dataserializer.dumps(array)))
assert_array_equal(array, dataserializer.loads(dataserializer.dumps(
array, compress=dataserializer.COMPRESS_FLAG_LZ4)))
fn = os.path.join(tempfile.gettempdir(), 'test_dump_file_%d.bin' % id(self))
try:
array = np.random.rand(1000, 100).T # test non c-contiguous
with open(fn, 'wb') as dump_file:
dataserializer.dump(array, dump_file)
with open(fn, 'rb') as dump_file:
assert_array_equal(array, dataserializer.load(dump_file))
with open(fn, 'wb') as dump_file:
dataserializer.dump(array, dump_file,
compress=dataserializer.COMPRESS_FLAG_LZ4)
with open(fn, 'rb') as dump_file:
assert_array_equal(array, dataserializer.load(dump_file))
finally:
if os.path.exists(fn):
os.unlink(fn)
if sps:
mat = sparse.SparseMatrix(sps.random(100, 100, 0.1, format='csr'))
des_mat = dataserializer.loads(dataserializer.dumps(mat))
self.assertTrue((mat.spmatrix != des_mat.spmatrix).nnz == 0)
des_mat = dataserializer.loads(dataserializer.dumps(
mat, compress=dataserializer.COMPRESS_FLAG_LZ4))
self.assertTrue((mat.spmatrix != des_mat.spmatrix).nnz == 0)
def _read_data_batch(reader):
bio = BytesIO()
with reader:
while True:
buf = reader.read(io_size)
if buf:
bio.write(buf)
else:
break
return dataserializer.loads(bio.getvalue())
def testArrowBufferIO(self):
if not np:
return
import pyarrow
from numpy.testing import assert_array_equal
for compress in [
dataserializer.CompressType.LZ4,
dataserializer.CompressType.GZIP
]:
if compress not in dataserializer.get_supported_compressions():
continue
data = np.random.random((1000, 100))
serialized = pyarrow.serialize(data).to_buffer()
# test complete read
reader = ArrowBufferIO(pyarrow.py_buffer(serialized),
'r',
compress_out=compress)
assert_array_equal(data, dataserializer.loads(reader.read()))
# test partial read
reader = ArrowBufferIO(pyarrow.py_buffer(serialized),
'r',
compress_out=compress)
block = reader.read(128)
data_left = reader.read()
assert_array_equal(data, dataserializer.loads(block + data_left))
# test read by chunks
bio = BytesIO()
reader = ArrowBufferIO(pyarrow.py_buffer(serialized),
'r',
compress_out=compress)
while True:
block = reader.read(128)
if not block:
break
bio.write(block)
compressed = bio.getvalue()
assert_array_equal(data, dataserializer.loads(compressed))
# test write by chunks
data_sink = bytearray(len(serialized))
compressed_mv = memoryview(compressed)
writer = ArrowBufferIO(pyarrow.py_buffer(data_sink), 'w')
pos = 0
while pos < len(compressed):
endpos = min(pos + 128, len(compressed))
writer.write(compressed_mv[pos:endpos])
pos = endpos
assert_array_equal(data, pyarrow.deserialize(data_sink))
def create_data_writer(self, session_id, chunk_key, data_size, sender_ref,
ensure_cached=True, timeout=0, callback=None):
from mars.compat import BytesIO
query_key = (session_id, chunk_key)
if query_key in self._data_metas and \
self._data_metas[query_key].status in (ReceiveStatus.RECEIVED, ReceiveStatus.RECEIVING):
self.tell_promise(callback, self.address, self._data_metas[query_key].status)
return
self._data_metas[query_key] = ReceiverDataMeta(chunk_size=data_size, status=ReceiveStatus.RECEIVING)
self._data_writers[query_key] = BytesIO()
self.tell_promise(callback, self.address, None)
def testDataSerialize(self):
try:
import numpy as np
from numpy.testing import assert_array_equal
except ImportError:
np = None
try:
import scipy.sparse as sps
except ImportError:
sps = None
if np:
array = np.random.rand(1000, 100)
assert_array_equal(
array, dataserializer.loads(dataserializer.dumps(array)))
assert_array_equal(
array,
dataserializer.loads(
dataserializer.dumps(
array, compress=dataserializer.CompressType.LZ4)))
if not six.PY2:
assert_array_equal(
array,
dataserializer.loads(
dataserializer.dumps(
array, compress=dataserializer.CompressType.GZIP)))
array = np.random.rand(1000, 100)
assert_array_equal(
array,
dataserializer.load(BytesIO(dataserializer.dumps(array))))
assert_array_equal(
array,
dataserializer.load(
BytesIO(
dataserializer.dumps(
array, compress=dataserializer.CompressType.LZ4))))
if not six.PY2:
assert_array_equal(
array,
dataserializer.load(
BytesIO(
dataserializer.dumps(
array,
compress=dataserializer.CompressType.GZIP))))
array = np.random.rand(1000, 100).T # test non c-contiguous
assert_array_equal(
array, dataserializer.loads(dataserializer.dumps(array)))
assert_array_equal(
array,
dataserializer.loads(
dataserializer.dumps(
array, compress=dataserializer.CompressType.LZ4)))
if not six.PY2:
assert_array_equal(
array,
dataserializer.loads(
dataserializer.dumps(
array, compress=dataserializer.CompressType.GZIP)))
array = np.float64(0.2345)
assert_array_equal(
array, dataserializer.loads(dataserializer.dumps(array)))
assert_array_equal(
array,
dataserializer.loads(
dataserializer.dumps(
array, compress=dataserializer.CompressType.LZ4)))
if not six.PY2:
assert_array_equal(
array,
dataserializer.loads(
dataserializer.dumps(
array, compress=dataserializer.CompressType.GZIP)))
# test structured arrays.
rec_dtype = np.dtype([('a', 'int64'), ('b', 'double'),
('c', '<U8')])
array = np.ones((100, ), dtype=rec_dtype)
array_loaded = dataserializer.loads(dataserializer.dumps(array))
self.assertEqual(array.dtype, array_loaded.dtype)
assert_array_equal(array, array_loaded)
fn = os.path.join(tempfile.gettempdir(),
'test_dump_file_%d.bin' % id(self))
try:
array = np.random.rand(1000, 100).T # test non c-contiguous
with open(fn, 'wb') as dump_file:
dataserializer.dump(array, dump_file)
with open(fn, 'rb') as dump_file:
assert_array_equal(array, dataserializer.load(dump_file))
with open(fn, 'wb') as dump_file:
dataserializer.dump(
array,
dump_file,
compress=dataserializer.CompressType.LZ4)
with open(fn, 'rb') as dump_file:
assert_array_equal(array, dataserializer.load(dump_file))
if not six.PY2:
with open(fn, 'wb') as dump_file:
dataserializer.dump(
array,
dump_file,
compress=dataserializer.CompressType.GZIP)
with open(fn, 'rb') as dump_file:
assert_array_equal(array,
dataserializer.load(dump_file))
finally:
if os.path.exists(fn):
os.unlink(fn)
if sps:
mat = sparse.SparseMatrix(sps.random(100, 100, 0.1, format='csr'))
des_mat = dataserializer.loads(dataserializer.dumps(mat))
self.assertTrue((mat.spmatrix != des_mat.spmatrix).nnz == 0)
des_mat = dataserializer.loads(
dataserializer.dumps(mat,
compress=dataserializer.CompressType.LZ4))
self.assertTrue((mat.spmatrix != des_mat.spmatrix).nnz == 0)
if not six.PY2:
des_mat = dataserializer.loads(
dataserializer.dumps(
mat, compress=dataserializer.CompressType.GZIP))
self.assertTrue((mat.spmatrix != des_mat.spmatrix).nnz == 0)
vector = sparse.SparseVector(sps.csr_matrix(np.random.rand(2)),
shape=(2, ))
des_vector = dataserializer.loads(dataserializer.dumps(vector))
self.assertTrue((vector.spmatrix != des_vector.spmatrix).nnz == 0)
des_vector = dataserializer.loads(
dataserializer.dumps(vector,
compress=dataserializer.CompressType.LZ4))
self.assertTrue((vector.spmatrix != des_vector.spmatrix).nnz == 0)
if not six.PY2:
des_vector = dataserializer.loads(
dataserializer.dumps(
vector, compress=dataserializer.CompressType.GZIP))
self.assertTrue(
(vector.spmatrix != des_vector.spmatrix).nnz == 0)
def testFileBufferIO(self):
if not np:
return
from numpy.testing import assert_array_equal
compressions = [dataserializer.CompressType.NONE] + \
list(dataserializer.get_supported_compressions())
for c1 in compressions:
for c2 in compressions:
data = np.random.random((1000, 100))
# test complete read
compressed_read_file = BytesIO(
dataserializer.dumps(data, compress=c1))
reader = FileBufferIO(compressed_read_file,
'r',
compress_out=c2)
compressed = reader.read()
self.assertEqual(
c2,
dataserializer.read_file_header(compressed).compress)
assert_array_equal(data, dataserializer.loads(compressed))
# test partial read
compressed_read_file = BytesIO(
dataserializer.dumps(data, compress=c1))
reader = FileBufferIO(compressed_read_file,
'r',
compress_out=c2)
block = reader.read(128)
data_left = reader.read()
assert_array_equal(data,
dataserializer.loads(block + data_left))
# test read by chunks
bio = BytesIO()
compressed_read_file = BytesIO(
dataserializer.dumps(data, compress=c1))
reader = FileBufferIO(compressed_read_file,
'r',
compress_out=c2)
while True:
block = reader.read(128)
if not block:
break
bio.write(block)
compressed = bio.getvalue()
self.assertEqual(
c2,
dataserializer.read_file_header(compressed).compress)
assert_array_equal(data, dataserializer.loads(compressed))
# test write by chunks
compressed_read_file.seek(0)
compressed_write_file = BytesIO()
writer = FileBufferIO(compressed_write_file,
'w',
compress_in=c2,
managed=False)
while True:
block = compressed_read_file.read(128)
if not block:
break
writer.write(block)
writer.close()
compressed = compressed_write_file.getvalue()
self.assertEqual(
c2,
dataserializer.read_file_header(compressed).compress)
assert_array_equal(data, dataserializer.loads(compressed))
