def test_read_images():
header = struct.pack('>iiii', MNIST_IMAGE_MAGIC, 4, 3, 2)
data = six.b('\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00'
'\t\x00\x00\x00\x00\x00\x00\xff.\x00\x00\x00\x00\x00')
with tempfile.TemporaryFile() as f:
buf = header + data
f.write(buf)
f.seek(0)
arr = read_mnist_images(f)
assert arr.dtype == numpy.dtype('uint8')
assert arr[0, 1, 1] == 4
assert arr[1, 2, 0] == 9
assert arr[2, 2, 1] == 255
assert arr[3, 0, 0] == 46
assert (arr == 0).sum() == 20
f.seek(0)
arr = read_mnist_images(f, dtype='float32')
assert arr.dtype == numpy.dtype('float32')
assert arr[0, 1, 1] == numpy.float32(4 / 255.)
assert arr[1, 2, 0] == numpy.float32(9 / 255.)
assert arr[2, 2, 1] == 1.0
assert arr[3, 0, 0] == numpy.float32(46 / 255.)
assert (arr == 0).sum() == 20
f.seek(0)
arr = read_mnist_images(f, dtype='bool')
assert arr.dtype == numpy.dtype('bool')
assert arr[2, 2, 1]
assert (arr == 0).sum() == 23
def test_load_path():
fd, fname = tempfile.mkstemp()
with os.fdopen(fd, 'wb') as f:
f.write(six.b("a: 23"))
loaded = load_path(fname)
assert_(loaded['a'] == 23)
os.remove(fname)
def test_load_path():
fd, fname = tempfile.mkstemp()
with os.fdopen(fd, 'wb') as f:
f.write(six.b("a: 23"))
loaded = load_path(fname)
assert_(loaded['a'] == 23)
os.remove(fname)
def test_read_images():
header = struct.pack('>iiii', MNIST_IMAGE_MAGIC, 4, 3, 2)
data = six.b('\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00'
'\t\x00\x00\x00\x00\x00\x00\xff.\x00\x00\x00\x00\x00')
with tempfile.TemporaryFile() as f:
buf = header + data
f.write(buf)
f.seek(0)
arr = read_mnist_images(f)
assert arr.dtype == numpy.dtype('uint8')
assert arr[0, 1, 1] == 4
assert arr[1, 2, 0] == 9
assert arr[2, 2, 1] == 255
assert arr[3, 0, 0] == 46
assert (arr == 0).sum() == 20
f.seek(0)
arr = read_mnist_images(f, dtype='float32')
assert arr.dtype == numpy.dtype('float32')
assert arr[0, 1, 1] == numpy.float32(4 / 255.)
assert arr[1, 2, 0] == numpy.float32(9 / 255.)
assert arr[2, 2, 1] == 1.0
assert arr[3, 0, 0] == numpy.float32(46 / 255.)
assert (arr == 0).sum() == 20
f.seek(0)
arr = read_mnist_images(f, dtype='bool')
assert arr.dtype == numpy.dtype('bool')
assert arr[2, 2, 1]
assert (arr == 0).sum() == 23
