def test_ndt_type_as_numpy(self):
self.assertEqual(ndt.bool.as_numpy(), np.dtype('bool'))
self.assertEqual(ndt.int8.as_numpy(), np.dtype('int8'))
self.assertEqual(ndt.int16.as_numpy(), np.dtype('int16'))
self.assertEqual(ndt.int32.as_numpy(), np.dtype('int32'))
self.assertEqual(ndt.int64.as_numpy(), np.dtype('int64'))
self.assertEqual(ndt.uint8.as_numpy(), np.dtype('uint8'))
self.assertEqual(ndt.uint16.as_numpy(), np.dtype('uint16'))
self.assertEqual(ndt.uint32.as_numpy(), np.dtype('uint32'))
self.assertEqual(ndt.uint64.as_numpy(), np.dtype('uint64'))
self.assertEqual(ndt.float32.as_numpy(), np.dtype('float32'))
self.assertEqual(ndt.float64.as_numpy(), np.dtype('float64'))
self.assertEqual(ndt.complex_float32.as_numpy(), np.dtype('complex64'))
self.assertEqual(ndt.complex_float64.as_numpy(), np.dtype('complex128'))
# nonnative byte order
nonnative = self.nonnative
self.assertEqual(ndt.make_byteswap(ndt.int16).as_numpy(),
np.dtype(nonnative + 'i2'))
self.assertEqual(ndt.make_byteswap(ndt.float64).as_numpy(),
np.dtype(nonnative + 'f8'))
# aligned struct
tp0 = ndt.type('c{x : int32, y : int64}').as_numpy()
tp1 = np.dtype([('x', np.int32), ('y', np.int64)], align=True)
self.assertEqual(tp0, tp1)
# unaligned struct
tp0 = ndt.make_cstruct([ndt.make_unaligned(ndt.int32),
ndt.make_unaligned(ndt.int64)],
['x', 'y']).as_numpy()
tp1 = np.dtype([('x', np.int32), ('y', np.int64)])
self.assertEqual(tp0, tp1)
# check some types which can't be converted
self.assertRaises(TypeError, ndt.date.as_numpy)
self.assertRaises(TypeError, ndt.datetime.as_numpy)
self.assertRaises(TypeError, ndt.bytes.as_numpy)
self.assertRaises(TypeError, ndt.string.as_numpy)
def test_type_from_ctype_cstruct(self):
class POINT(ctypes.Structure):
_fields_ = [('x', ctypes.c_int32), ('y', ctypes.c_int32)]
self.assertEqual(ndt.make_cstruct(
[ndt.int32, ndt.int32],['x', 'y']),
ndt.type(POINT))
class DATA(ctypes.Structure):
_fields_ = [
('pos', POINT),
('flags', ctypes.c_int8),
('size', ctypes.c_float),
('vel', POINT)
]
self.assertEqual(ndt.make_cstruct([POINT, ndt.int8, ndt.float32, POINT],
['pos', 'flags', 'size', 'vel']),
ndt.type(DATA))
def test_struct_function(self):
a = nd.array(date(1955,3,13))
s = a.to_struct().eval()
self.assertEqual(nd.dtype_of(s),
ndt.make_cstruct(
[ndt.int32, ndt.int16, ndt.int16],
['year', 'month', 'day']))
self.assertEqual(nd.as_py(s.year), 1955)
self.assertEqual(nd.as_py(s.month), 3)
self.assertEqual(nd.as_py(s.day), 13)
def test_struct_function(self):
a = nd.array(time(13, 25, 8, 765432))
s = a.to_struct().eval()
self.assertEqual(nd.dtype_of(s),
ndt.make_cstruct(
[ndt.int8, ndt.int8, ndt.int8, ndt.int32],
['hour', 'minute', 'second', 'tick']))
self.assertEqual(nd.as_py(s.hour), 13)
self.assertEqual(nd.as_py(s.minute), 25)
self.assertEqual(nd.as_py(s.second), 8)
self.assertEqual(nd.as_py(s.tick), 7654320)
def test_ndt_type_from_numpy_dtype_struct(self):
# aligned struct
tp0 = ndt.type(np.dtype([('x', np.int32), ('y', np.int64)],
align=True))
tp1 = ndt.type('c{x : int32, y : int64}')
self.assertEqual(tp0, tp1)
# unaligned struct
tp0 = ndt.type(np.dtype([('x', np.int32), ('y', np.int64)]))
tp1 = ndt.make_cstruct([ndt.make_unaligned(ndt.int32),
ndt.make_unaligned(ndt.int64)],
['x', 'y'])
self.assertEqual(tp0, tp1)
def test_struct_casting(self):
a = nd.array([date(1912,3,4), date(2002,1,30)])
# cast from date to struct
s = a.ucast(ndt.make_cstruct([ndt.int64, ndt.int16, ndt.int8],
['year', 'month', 'day']))
s = s.eval()
self.assertEqual(nd.as_py(s.year), [1912, 2002])
self.assertEqual(nd.as_py(s.month), [3, 1])
self.assertEqual(nd.as_py(s.day), [4, 30])
# cast from struct back to date
d = s.ucast(ndt.date)
d = d.eval()
self.assertEqual(nd.as_py(d), [date(1912,3,4), date(2002,1,30)])
def test_struct_casting(self):
a = nd.array([time(13, 25, 8, 765432), time(23, 52)])
# cast from time to struct
s = a.ucast(ndt.make_cstruct([ndt.int64, ndt.int16, ndt.int8, ndt.int32],
['hour', 'minute', 'second', 'tick']))
s = s.eval()
self.assertEqual(nd.as_py(s.hour), [13, 23])
self.assertEqual(nd.as_py(s.minute), [25, 52])
self.assertEqual(nd.as_py(s.second), [8, 0])
self.assertEqual(nd.as_py(s.tick), [7654320, 0])
# cast from struct back to time
t = s.ucast(ndt.time)
t = t.eval()
self.assertEqual(nd.as_py(t), [time(13, 25, 8, 765432), time(23, 52)])