test_eigen.py revision 12391 
1import pytest
2from pybind11_tests import ConstructorStats
3
4pytestmark = pytest.requires_eigen_and_numpy
5
6with pytest.suppress(ImportError):
7    from pybind11_tests import eigen as m
8    import numpy as np
9
10    ref = np.array([[ 0.,  3,  0,  0,  0, 11],
11                    [22,  0,  0,  0, 17, 11],
12                    [ 7,  5,  0,  1,  0, 11],
13                    [ 0,  0,  0,  0,  0, 11],
14                    [ 0,  0, 14,  0,  8, 11]])
15
16
17def assert_equal_ref(mat):
18    np.testing.assert_array_equal(mat, ref)
19
20
21def assert_sparse_equal_ref(sparse_mat):
22    assert_equal_ref(sparse_mat.todense())
23
24
25def test_fixed():
26    assert_equal_ref(m.fixed_c())
27    assert_equal_ref(m.fixed_r())
28    assert_equal_ref(m.fixed_copy_r(m.fixed_r()))
29    assert_equal_ref(m.fixed_copy_c(m.fixed_c()))
30    assert_equal_ref(m.fixed_copy_r(m.fixed_c()))
31    assert_equal_ref(m.fixed_copy_c(m.fixed_r()))
32
33
34def test_dense():
35    assert_equal_ref(m.dense_r())
36    assert_equal_ref(m.dense_c())
37    assert_equal_ref(m.dense_copy_r(m.dense_r()))
38    assert_equal_ref(m.dense_copy_c(m.dense_c()))
39    assert_equal_ref(m.dense_copy_r(m.dense_c()))
40    assert_equal_ref(m.dense_copy_c(m.dense_r()))
41
42
43def test_partially_fixed():
44    ref2 = np.array([[0., 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11], [12, 13, 14, 15]])
45    np.testing.assert_array_equal(m.partial_copy_four_rm_r(ref2), ref2)
46    np.testing.assert_array_equal(m.partial_copy_four_rm_c(ref2), ref2)
47    np.testing.assert_array_equal(m.partial_copy_four_rm_r(ref2[:, 1]), ref2[:, [1]])
48    np.testing.assert_array_equal(m.partial_copy_four_rm_c(ref2[0, :]), ref2[[0], :])
49    np.testing.assert_array_equal(m.partial_copy_four_rm_r(ref2[:, (0, 2)]), ref2[:, (0, 2)])
50    np.testing.assert_array_equal(
51        m.partial_copy_four_rm_c(ref2[(3, 1, 2), :]), ref2[(3, 1, 2), :])
52
53    np.testing.assert_array_equal(m.partial_copy_four_cm_r(ref2), ref2)
54    np.testing.assert_array_equal(m.partial_copy_four_cm_c(ref2), ref2)
55    np.testing.assert_array_equal(m.partial_copy_four_cm_r(ref2[:, 1]), ref2[:, [1]])
56    np.testing.assert_array_equal(m.partial_copy_four_cm_c(ref2[0, :]), ref2[[0], :])
57    np.testing.assert_array_equal(m.partial_copy_four_cm_r(ref2[:, (0, 2)]), ref2[:, (0, 2)])
58    np.testing.assert_array_equal(
59        m.partial_copy_four_cm_c(ref2[(3, 1, 2), :]), ref2[(3, 1, 2), :])
60
61    # TypeError should be raise for a shape mismatch
62    functions = [m.partial_copy_four_rm_r, m.partial_copy_four_rm_c,
63                 m.partial_copy_four_cm_r, m.partial_copy_four_cm_c]
64    matrix_with_wrong_shape = [[1, 2],
65                               [3, 4]]
66    for f in functions:
67        with pytest.raises(TypeError) as excinfo:
68            f(matrix_with_wrong_shape)
69        assert "incompatible function arguments" in str(excinfo.value)
70
71
72def test_mutator_descriptors():
73    zr = np.arange(30, dtype='float32').reshape(5, 6)  # row-major
74    zc = zr.reshape(6, 5).transpose()  # column-major
75
76    m.fixed_mutator_r(zr)
77    m.fixed_mutator_c(zc)
78    m.fixed_mutator_a(zr)
79    m.fixed_mutator_a(zc)
80    with pytest.raises(TypeError) as excinfo:
81        m.fixed_mutator_r(zc)
82    assert ('(arg0: numpy.ndarray[float32[5, 6], flags.writeable, flags.c_contiguous]) -> None'
83            in str(excinfo.value))
84    with pytest.raises(TypeError) as excinfo:
85        m.fixed_mutator_c(zr)
86    assert ('(arg0: numpy.ndarray[float32[5, 6], flags.writeable, flags.f_contiguous]) -> None'
87            in str(excinfo.value))
88    with pytest.raises(TypeError) as excinfo:
89        m.fixed_mutator_a(np.array([[1, 2], [3, 4]], dtype='float32'))
90    assert ('(arg0: numpy.ndarray[float32[5, 6], flags.writeable]) -> None'
91            in str(excinfo.value))
92    zr.flags.writeable = False
93    with pytest.raises(TypeError):
94        m.fixed_mutator_r(zr)
95    with pytest.raises(TypeError):
96        m.fixed_mutator_a(zr)
97
98
99def test_cpp_casting():
100    assert m.cpp_copy(m.fixed_r()) == 22.
101    assert m.cpp_copy(m.fixed_c()) == 22.
102    z = np.array([[5., 6], [7, 8]])
103    assert m.cpp_copy(z) == 7.
104    assert m.cpp_copy(m.get_cm_ref()) == 21.
105    assert m.cpp_copy(m.get_rm_ref()) == 21.
106    assert m.cpp_ref_c(m.get_cm_ref()) == 21.
107    assert m.cpp_ref_r(m.get_rm_ref()) == 21.
108    with pytest.raises(RuntimeError) as excinfo:
109        # Can't reference m.fixed_c: it contains floats, m.cpp_ref_any wants doubles
110        m.cpp_ref_any(m.fixed_c())
111    assert 'Unable to cast Python instance' in str(excinfo.value)
112    with pytest.raises(RuntimeError) as excinfo:
113        # Can't reference m.fixed_r: it contains floats, m.cpp_ref_any wants doubles
114        m.cpp_ref_any(m.fixed_r())
115    assert 'Unable to cast Python instance' in str(excinfo.value)
116    assert m.cpp_ref_any(m.ReturnTester.create()) == 1.
117
118    assert m.cpp_ref_any(m.get_cm_ref()) == 21.
119    assert m.cpp_ref_any(m.get_cm_ref()) == 21.
120
121
122def test_pass_readonly_array():
123    z = np.full((5, 6), 42.0)
124    z.flags.writeable = False
125    np.testing.assert_array_equal(z, m.fixed_copy_r(z))
126    np.testing.assert_array_equal(m.fixed_r_const(), m.fixed_r())
127    assert not m.fixed_r_const().flags.writeable
128    np.testing.assert_array_equal(m.fixed_copy_r(m.fixed_r_const()), m.fixed_r_const())
129
130
131def test_nonunit_stride_from_python():
132    counting_mat = np.arange(9.0, dtype=np.float32).reshape((3, 3))
133    second_row = counting_mat[1, :]
134    second_col = counting_mat[:, 1]
135    np.testing.assert_array_equal(m.double_row(second_row), 2.0 * second_row)
136    np.testing.assert_array_equal(m.double_col(second_row), 2.0 * second_row)
137    np.testing.assert_array_equal(m.double_complex(second_row), 2.0 * second_row)
138    np.testing.assert_array_equal(m.double_row(second_col), 2.0 * second_col)
139    np.testing.assert_array_equal(m.double_col(second_col), 2.0 * second_col)
140    np.testing.assert_array_equal(m.double_complex(second_col), 2.0 * second_col)
141
142    counting_3d = np.arange(27.0, dtype=np.float32).reshape((3, 3, 3))
143    slices = [counting_3d[0, :, :], counting_3d[:, 0, :], counting_3d[:, :, 0]]
144    for slice_idx, ref_mat in enumerate(slices):
145        np.testing.assert_array_equal(m.double_mat_cm(ref_mat), 2.0 * ref_mat)
146        np.testing.assert_array_equal(m.double_mat_rm(ref_mat), 2.0 * ref_mat)
147
148    # Mutator:
149    m.double_threer(second_row)
150    m.double_threec(second_col)
151    np.testing.assert_array_equal(counting_mat, [[0., 2, 2], [6, 16, 10], [6, 14, 8]])
152
153
154def test_negative_stride_from_python(msg):
155    """Eigen doesn't support (as of yet) negative strides. When a function takes an Eigen matrix by
156    copy or const reference, we can pass a numpy array that has negative strides.  Otherwise, an
157    exception will be thrown as Eigen will not be able to map the numpy array."""
158
159    counting_mat = np.arange(9.0, dtype=np.float32).reshape((3, 3))
160    counting_mat = counting_mat[::-1, ::-1]
161    second_row = counting_mat[1, :]
162    second_col = counting_mat[:, 1]
163    np.testing.assert_array_equal(m.double_row(second_row), 2.0 * second_row)
164    np.testing.assert_array_equal(m.double_col(second_row), 2.0 * second_row)
165    np.testing.assert_array_equal(m.double_complex(second_row), 2.0 * second_row)
166    np.testing.assert_array_equal(m.double_row(second_col), 2.0 * second_col)
167    np.testing.assert_array_equal(m.double_col(second_col), 2.0 * second_col)
168    np.testing.assert_array_equal(m.double_complex(second_col), 2.0 * second_col)
169
170    counting_3d = np.arange(27.0, dtype=np.float32).reshape((3, 3, 3))
171    counting_3d = counting_3d[::-1, ::-1, ::-1]
172    slices = [counting_3d[0, :, :], counting_3d[:, 0, :], counting_3d[:, :, 0]]
173    for slice_idx, ref_mat in enumerate(slices):
174        np.testing.assert_array_equal(m.double_mat_cm(ref_mat), 2.0 * ref_mat)
175        np.testing.assert_array_equal(m.double_mat_rm(ref_mat), 2.0 * ref_mat)
176
177    # Mutator:
178    with pytest.raises(TypeError) as excinfo:
179        m.double_threer(second_row)
180    assert msg(excinfo.value) == """
181        double_threer(): incompatible function arguments. The following argument types are supported:
182            1. (arg0: numpy.ndarray[float32[1, 3], flags.writeable]) -> None
183
184        Invoked with: array([ 5.,  4.,  3.], dtype=float32)
185    """  # noqa: E501 line too long
186
187    with pytest.raises(TypeError) as excinfo:
188        m.double_threec(second_col)
189    assert msg(excinfo.value) == """
190        double_threec(): incompatible function arguments. The following argument types are supported:
191            1. (arg0: numpy.ndarray[float32[3, 1], flags.writeable]) -> None
192
193        Invoked with: array([ 7.,  4.,  1.], dtype=float32)
194    """  # noqa: E501 line too long
195
196
197def test_nonunit_stride_to_python():
198    assert np.all(m.diagonal(ref) == ref.diagonal())
199    assert np.all(m.diagonal_1(ref) == ref.diagonal(1))
200    for i in range(-5, 7):
201        assert np.all(m.diagonal_n(ref, i) == ref.diagonal(i)), "m.diagonal_n({})".format(i)
202
203    assert np.all(m.block(ref, 2, 1, 3, 3) == ref[2:5, 1:4])
204    assert np.all(m.block(ref, 1, 4, 4, 2) == ref[1:, 4:])
205    assert np.all(m.block(ref, 1, 4, 3, 2) == ref[1:4, 4:])
206
207
208def test_eigen_ref_to_python():
209    chols = [m.cholesky1, m.cholesky2, m.cholesky3, m.cholesky4]
210    for i, chol in enumerate(chols, start=1):
211        mymat = chol(np.array([[1., 2, 4], [2, 13, 23], [4, 23, 77]]))
212        assert np.all(mymat == np.array([[1, 0, 0], [2, 3, 0], [4, 5, 6]])), "cholesky{}".format(i)
213
214
215def assign_both(a1, a2, r, c, v):
216    a1[r, c] = v
217    a2[r, c] = v
218
219
220def array_copy_but_one(a, r, c, v):
221    z = np.array(a, copy=True)
222    z[r, c] = v
223    return z
224
225
226def test_eigen_return_references():
227    """Tests various ways of returning references and non-referencing copies"""
228
229    master = np.ones((10, 10))
230    a = m.ReturnTester()
231    a_get1 = a.get()
232    assert not a_get1.flags.owndata and a_get1.flags.writeable
233    assign_both(a_get1, master, 3, 3, 5)
234    a_get2 = a.get_ptr()
235    assert not a_get2.flags.owndata and a_get2.flags.writeable
236    assign_both(a_get1, master, 2, 3, 6)
237
238    a_view1 = a.view()
239    assert not a_view1.flags.owndata and not a_view1.flags.writeable
240    with pytest.raises(ValueError):
241        a_view1[2, 3] = 4
242    a_view2 = a.view_ptr()
243    assert not a_view2.flags.owndata and not a_view2.flags.writeable
244    with pytest.raises(ValueError):
245        a_view2[2, 3] = 4
246
247    a_copy1 = a.copy_get()
248    assert a_copy1.flags.owndata and a_copy1.flags.writeable
249    np.testing.assert_array_equal(a_copy1, master)
250    a_copy1[7, 7] = -44  # Shouldn't affect anything else
251    c1want = array_copy_but_one(master, 7, 7, -44)
252    a_copy2 = a.copy_view()
253    assert a_copy2.flags.owndata and a_copy2.flags.writeable
254    np.testing.assert_array_equal(a_copy2, master)
255    a_copy2[4, 4] = -22  # Shouldn't affect anything else
256    c2want = array_copy_but_one(master, 4, 4, -22)
257
258    a_ref1 = a.ref()
259    assert not a_ref1.flags.owndata and a_ref1.flags.writeable
260    assign_both(a_ref1, master, 1, 1, 15)
261    a_ref2 = a.ref_const()
262    assert not a_ref2.flags.owndata and not a_ref2.flags.writeable
263    with pytest.raises(ValueError):
264        a_ref2[5, 5] = 33
265    a_ref3 = a.ref_safe()
266    assert not a_ref3.flags.owndata and a_ref3.flags.writeable
267    assign_both(a_ref3, master, 0, 7, 99)
268    a_ref4 = a.ref_const_safe()
269    assert not a_ref4.flags.owndata and not a_ref4.flags.writeable
270    with pytest.raises(ValueError):
271        a_ref4[7, 0] = 987654321
272
273    a_copy3 = a.copy_ref()
274    assert a_copy3.flags.owndata and a_copy3.flags.writeable
275    np.testing.assert_array_equal(a_copy3, master)
276    a_copy3[8, 1] = 11
277    c3want = array_copy_but_one(master, 8, 1, 11)
278    a_copy4 = a.copy_ref_const()
279    assert a_copy4.flags.owndata and a_copy4.flags.writeable
280    np.testing.assert_array_equal(a_copy4, master)
281    a_copy4[8, 4] = 88
282    c4want = array_copy_but_one(master, 8, 4, 88)
283
284    a_block1 = a.block(3, 3, 2, 2)
285    assert not a_block1.flags.owndata and a_block1.flags.writeable
286    a_block1[0, 0] = 55
287    master[3, 3] = 55
288    a_block2 = a.block_safe(2, 2, 3, 2)
289    assert not a_block2.flags.owndata and a_block2.flags.writeable
290    a_block2[2, 1] = -123
291    master[4, 3] = -123
292    a_block3 = a.block_const(6, 7, 4, 3)
293    assert not a_block3.flags.owndata and not a_block3.flags.writeable
294    with pytest.raises(ValueError):
295        a_block3[2, 2] = -44444
296
297    a_copy5 = a.copy_block(2, 2, 2, 3)
298    assert a_copy5.flags.owndata and a_copy5.flags.writeable
299    np.testing.assert_array_equal(a_copy5, master[2:4, 2:5])
300    a_copy5[1, 1] = 777
301    c5want = array_copy_but_one(master[2:4, 2:5], 1, 1, 777)
302
303    a_corn1 = a.corners()
304    assert not a_corn1.flags.owndata and a_corn1.flags.writeable
305    a_corn1 *= 50
306    a_corn1[1, 1] = 999
307    master[0, 0] = 50
308    master[0, 9] = 50
309    master[9, 0] = 50
310    master[9, 9] = 999
311    a_corn2 = a.corners_const()
312    assert not a_corn2.flags.owndata and not a_corn2.flags.writeable
313    with pytest.raises(ValueError):
314        a_corn2[1, 0] = 51
315
316    # All of the changes made all the way along should be visible everywhere
317    # now (except for the copies, of course)
318    np.testing.assert_array_equal(a_get1, master)
319    np.testing.assert_array_equal(a_get2, master)
320    np.testing.assert_array_equal(a_view1, master)
321    np.testing.assert_array_equal(a_view2, master)
322    np.testing.assert_array_equal(a_ref1, master)
323    np.testing.assert_array_equal(a_ref2, master)
324    np.testing.assert_array_equal(a_ref3, master)
325    np.testing.assert_array_equal(a_ref4, master)
326    np.testing.assert_array_equal(a_block1, master[3:5, 3:5])
327    np.testing.assert_array_equal(a_block2, master[2:5, 2:4])
328    np.testing.assert_array_equal(a_block3, master[6:10, 7:10])
329    np.testing.assert_array_equal(a_corn1, master[0::master.shape[0] - 1, 0::master.shape[1] - 1])
330    np.testing.assert_array_equal(a_corn2, master[0::master.shape[0] - 1, 0::master.shape[1] - 1])
331
332    np.testing.assert_array_equal(a_copy1, c1want)
333    np.testing.assert_array_equal(a_copy2, c2want)
334    np.testing.assert_array_equal(a_copy3, c3want)
335    np.testing.assert_array_equal(a_copy4, c4want)
336    np.testing.assert_array_equal(a_copy5, c5want)
337
338
339def assert_keeps_alive(cl, method, *args):
340    cstats = ConstructorStats.get(cl)
341    start_with = cstats.alive()
342    a = cl()
343    assert cstats.alive() == start_with + 1
344    z = method(a, *args)
345    assert cstats.alive() == start_with + 1
346    del a
347    # Here's the keep alive in action:
348    assert cstats.alive() == start_with + 1
349    del z
350    # Keep alive should have expired:
351    assert cstats.alive() == start_with
352
353
354def test_eigen_keepalive():
355    a = m.ReturnTester()
356    cstats = ConstructorStats.get(m.ReturnTester)
357    assert cstats.alive() == 1
358    unsafe = [a.ref(), a.ref_const(), a.block(1, 2, 3, 4)]
359    copies = [a.copy_get(), a.copy_view(), a.copy_ref(), a.copy_ref_const(),
360              a.copy_block(4, 3, 2, 1)]
361    del a
362    assert cstats.alive() == 0
363    del unsafe
364    del copies
365
366    for meth in [m.ReturnTester.get, m.ReturnTester.get_ptr, m.ReturnTester.view,
367                 m.ReturnTester.view_ptr, m.ReturnTester.ref_safe, m.ReturnTester.ref_const_safe,
368                 m.ReturnTester.corners, m.ReturnTester.corners_const]:
369        assert_keeps_alive(m.ReturnTester, meth)
370
371    for meth in [m.ReturnTester.block_safe, m.ReturnTester.block_const]:
372        assert_keeps_alive(m.ReturnTester, meth, 4, 3, 2, 1)
373
374
375def test_eigen_ref_mutators():
376    """Tests Eigen's ability to mutate numpy values"""
377
378    orig = np.array([[1., 2, 3], [4, 5, 6], [7, 8, 9]])
379    zr = np.array(orig)
380    zc = np.array(orig, order='F')
381    m.add_rm(zr, 1, 0, 100)
382    assert np.all(zr == np.array([[1., 2, 3], [104, 5, 6], [7, 8, 9]]))
383    m.add_cm(zc, 1, 0, 200)
384    assert np.all(zc == np.array([[1., 2, 3], [204, 5, 6], [7, 8, 9]]))
385
386    m.add_any(zr, 1, 0, 20)
387    assert np.all(zr == np.array([[1., 2, 3], [124, 5, 6], [7, 8, 9]]))
388    m.add_any(zc, 1, 0, 10)
389    assert np.all(zc == np.array([[1., 2, 3], [214, 5, 6], [7, 8, 9]]))
390
391    # Can't reference a col-major array with a row-major Ref, and vice versa:
392    with pytest.raises(TypeError):
393        m.add_rm(zc, 1, 0, 1)
394    with pytest.raises(TypeError):
395        m.add_cm(zr, 1, 0, 1)
396
397    # Overloads:
398    m.add1(zr, 1, 0, -100)
399    m.add2(zr, 1, 0, -20)
400    assert np.all(zr == orig)
401    m.add1(zc, 1, 0, -200)
402    m.add2(zc, 1, 0, -10)
403    assert np.all(zc == orig)
404
405    # a non-contiguous slice (this won't work on either the row- or
406    # column-contiguous refs, but should work for the any)
407    cornersr = zr[0::2, 0::2]
408    cornersc = zc[0::2, 0::2]
409
410    assert np.all(cornersr == np.array([[1., 3], [7, 9]]))
411    assert np.all(cornersc == np.array([[1., 3], [7, 9]]))
412
413    with pytest.raises(TypeError):
414        m.add_rm(cornersr, 0, 1, 25)
415    with pytest.raises(TypeError):
416        m.add_cm(cornersr, 0, 1, 25)
417    with pytest.raises(TypeError):
418        m.add_rm(cornersc, 0, 1, 25)
419    with pytest.raises(TypeError):
420        m.add_cm(cornersc, 0, 1, 25)
421    m.add_any(cornersr, 0, 1, 25)
422    m.add_any(cornersc, 0, 1, 44)
423    assert np.all(zr == np.array([[1., 2, 28], [4, 5, 6], [7, 8, 9]]))
424    assert np.all(zc == np.array([[1., 2, 47], [4, 5, 6], [7, 8, 9]]))
425
426    # You shouldn't be allowed to pass a non-writeable array to a mutating Eigen method:
427    zro = zr[0:4, 0:4]
428    zro.flags.writeable = False
429    with pytest.raises(TypeError):
430        m.add_rm(zro, 0, 0, 0)
431    with pytest.raises(TypeError):
432        m.add_any(zro, 0, 0, 0)
433    with pytest.raises(TypeError):
434        m.add1(zro, 0, 0, 0)
435    with pytest.raises(TypeError):
436        m.add2(zro, 0, 0, 0)
437
438    # integer array shouldn't be passable to a double-matrix-accepting mutating func:
439    zi = np.array([[1, 2], [3, 4]])
440    with pytest.raises(TypeError):
441        m.add_rm(zi)
442
443
444def test_numpy_ref_mutators():
445    """Tests numpy mutating Eigen matrices (for returned Eigen::Ref<...>s)"""
446
447    m.reset_refs()  # In case another test already changed it
448
449    zc = m.get_cm_ref()
450    zcro = m.get_cm_const_ref()
451    zr = m.get_rm_ref()
452    zrro = m.get_rm_const_ref()
453
454    assert [zc[1, 2], zcro[1, 2], zr[1, 2], zrro[1, 2]] == [23] * 4
455
456    assert not zc.flags.owndata and zc.flags.writeable
457    assert not zr.flags.owndata and zr.flags.writeable
458    assert not zcro.flags.owndata and not zcro.flags.writeable
459    assert not zrro.flags.owndata and not zrro.flags.writeable
460
461    zc[1, 2] = 99
462    expect = np.array([[11., 12, 13], [21, 22, 99], [31, 32, 33]])
463    # We should have just changed zc, of course, but also zcro and the original eigen matrix
464    assert np.all(zc == expect)
465    assert np.all(zcro == expect)
466    assert np.all(m.get_cm_ref() == expect)
467
468    zr[1, 2] = 99
469    assert np.all(zr == expect)
470    assert np.all(zrro == expect)
471    assert np.all(m.get_rm_ref() == expect)
472
473    # Make sure the readonly ones are numpy-readonly:
474    with pytest.raises(ValueError):
475        zcro[1, 2] = 6
476    with pytest.raises(ValueError):
477        zrro[1, 2] = 6
478
479    # We should be able to explicitly copy like this (and since we're copying,
480    # the const should drop away)
481    y1 = np.array(m.get_cm_const_ref())
482
483    assert y1.flags.owndata and y1.flags.writeable
484    # We should get copies of the eigen data, which was modified above:
485    assert y1[1, 2] == 99
486    y1[1, 2] += 12
487    assert y1[1, 2] == 111
488    assert zc[1, 2] == 99  # Make sure we aren't referencing the original
489
490
491def test_both_ref_mutators():
492    """Tests a complex chain of nested eigen/numpy references"""
493
494    m.reset_refs()  # In case another test already changed it
495
496    z = m.get_cm_ref()  # numpy -> eigen
497    z[0, 2] -= 3
498    z2 = m.incr_matrix(z, 1)  # numpy -> eigen -> numpy -> eigen
499    z2[1, 1] += 6
500    z3 = m.incr_matrix(z, 2)  # (numpy -> eigen)^3
501    z3[2, 2] += -5
502    z4 = m.incr_matrix(z, 3)  # (numpy -> eigen)^4
503    z4[1, 1] -= 1
504    z5 = m.incr_matrix(z, 4)  # (numpy -> eigen)^5
505    z5[0, 0] = 0
506    assert np.all(z == z2)
507    assert np.all(z == z3)
508    assert np.all(z == z4)
509    assert np.all(z == z5)
510    expect = np.array([[0., 22, 20], [31, 37, 33], [41, 42, 38]])
511    assert np.all(z == expect)
512
513    y = np.array(range(100), dtype='float64').reshape(10, 10)
514    y2 = m.incr_matrix_any(y, 10)  # np -> eigen -> np
515    y3 = m.incr_matrix_any(y2[0::2, 0::2], -33)  # np -> eigen -> np slice -> np -> eigen -> np
516    y4 = m.even_rows(y3)  # numpy -> eigen slice -> (... y3)
517    y5 = m.even_cols(y4)  # numpy -> eigen slice -> (... y4)
518    y6 = m.incr_matrix_any(y5, 1000)  # numpy -> eigen -> (... y5)
519
520    # Apply same mutations using just numpy:
521    yexpect = np.array(range(100), dtype='float64').reshape(10, 10)
522    yexpect += 10
523    yexpect[0::2, 0::2] -= 33
524    yexpect[0::4, 0::4] += 1000
525    assert np.all(y6 == yexpect[0::4, 0::4])
526    assert np.all(y5 == yexpect[0::4, 0::4])
527    assert np.all(y4 == yexpect[0::4, 0::2])
528    assert np.all(y3 == yexpect[0::2, 0::2])
529    assert np.all(y2 == yexpect)
530    assert np.all(y == yexpect)
531
532
533def test_nocopy_wrapper():
534    # get_elem requires a column-contiguous matrix reference, but should be
535    # callable with other types of matrix (via copying):
536    int_matrix_colmajor = np.array([[1, 2, 3], [4, 5, 6], [7, 8, 9]], order='F')
537    dbl_matrix_colmajor = np.array(int_matrix_colmajor, dtype='double', order='F', copy=True)
538    int_matrix_rowmajor = np.array(int_matrix_colmajor, order='C', copy=True)
539    dbl_matrix_rowmajor = np.array(int_matrix_rowmajor, dtype='double', order='C', copy=True)
540
541    # All should be callable via get_elem:
542    assert m.get_elem(int_matrix_colmajor) == 8
543    assert m.get_elem(dbl_matrix_colmajor) == 8
544    assert m.get_elem(int_matrix_rowmajor) == 8
545    assert m.get_elem(dbl_matrix_rowmajor) == 8
546
547    # All but the second should fail with m.get_elem_nocopy:
548    with pytest.raises(TypeError) as excinfo:
549        m.get_elem_nocopy(int_matrix_colmajor)
550    assert ('get_elem_nocopy(): incompatible function arguments.' in str(excinfo.value) and
551            ', flags.f_contiguous' in str(excinfo.value))
552    assert m.get_elem_nocopy(dbl_matrix_colmajor) == 8
553    with pytest.raises(TypeError) as excinfo:
554        m.get_elem_nocopy(int_matrix_rowmajor)
555    assert ('get_elem_nocopy(): incompatible function arguments.' in str(excinfo.value) and
556            ', flags.f_contiguous' in str(excinfo.value))
557    with pytest.raises(TypeError) as excinfo:
558        m.get_elem_nocopy(dbl_matrix_rowmajor)
559    assert ('get_elem_nocopy(): incompatible function arguments.' in str(excinfo.value) and
560            ', flags.f_contiguous' in str(excinfo.value))
561
562    # For the row-major test, we take a long matrix in row-major, so only the third is allowed:
563    with pytest.raises(TypeError) as excinfo:
564        m.get_elem_rm_nocopy(int_matrix_colmajor)
565    assert ('get_elem_rm_nocopy(): incompatible function arguments.' in str(excinfo.value) and
566            ', flags.c_contiguous' in str(excinfo.value))
567    with pytest.raises(TypeError) as excinfo:
568        m.get_elem_rm_nocopy(dbl_matrix_colmajor)
569    assert ('get_elem_rm_nocopy(): incompatible function arguments.' in str(excinfo.value) and
570            ', flags.c_contiguous' in str(excinfo.value))
571    assert m.get_elem_rm_nocopy(int_matrix_rowmajor) == 8
572    with pytest.raises(TypeError) as excinfo:
573        m.get_elem_rm_nocopy(dbl_matrix_rowmajor)
574    assert ('get_elem_rm_nocopy(): incompatible function arguments.' in str(excinfo.value) and
575            ', flags.c_contiguous' in str(excinfo.value))
576
577
578def test_eigen_ref_life_support():
579    """Ensure the lifetime of temporary arrays created by the `Ref` caster
580
581    The `Ref` caster sometimes creates a copy which needs to stay alive. This needs to
582    happen both for directs casts (just the array) or indirectly (e.g. list of arrays).
583    """
584
585    a = np.full(shape=10, fill_value=8, dtype=np.int8)
586    assert m.get_elem_direct(a) == 8
587
588    list_of_a = [a]
589    assert m.get_elem_indirect(list_of_a) == 8
590
591
592def test_special_matrix_objects():
593    assert np.all(m.incr_diag(7) == np.diag([1., 2, 3, 4, 5, 6, 7]))
594
595    asymm = np.array([[ 1.,  2,  3,  4],
596                      [ 5,  6,  7,  8],
597                      [ 9, 10, 11, 12],
598                      [13, 14, 15, 16]])
599    symm_lower = np.array(asymm)
600    symm_upper = np.array(asymm)
601    for i in range(4):
602        for j in range(i + 1, 4):
603            symm_lower[i, j] = symm_lower[j, i]
604            symm_upper[j, i] = symm_upper[i, j]
605
606    assert np.all(m.symmetric_lower(asymm) == symm_lower)
607    assert np.all(m.symmetric_upper(asymm) == symm_upper)
608
609
610def test_dense_signature(doc):
611    assert doc(m.double_col) == """
612        double_col(arg0: numpy.ndarray[float32[m, 1]]) -> numpy.ndarray[float32[m, 1]]
613    """
614    assert doc(m.double_row) == """
615        double_row(arg0: numpy.ndarray[float32[1, n]]) -> numpy.ndarray[float32[1, n]]
616    """
617    assert doc(m.double_complex) == """
618        double_complex(arg0: numpy.ndarray[complex64[m, 1]]) -> numpy.ndarray[complex64[m, 1]]
619    """
620    assert doc(m.double_mat_rm) == """
621        double_mat_rm(arg0: numpy.ndarray[float32[m, n]]) -> numpy.ndarray[float32[m, n]]
622    """
623
624
625def test_named_arguments():
626    a = np.array([[1.0, 2], [3, 4], [5, 6]])
627    b = np.ones((2, 1))
628
629    assert np.all(m.matrix_multiply(a, b) == np.array([[3.], [7], [11]]))
630    assert np.all(m.matrix_multiply(A=a, B=b) == np.array([[3.], [7], [11]]))
631    assert np.all(m.matrix_multiply(B=b, A=a) == np.array([[3.], [7], [11]]))
632
633    with pytest.raises(ValueError) as excinfo:
634        m.matrix_multiply(b, a)
635    assert str(excinfo.value) == 'Nonconformable matrices!'
636
637    with pytest.raises(ValueError) as excinfo:
638        m.matrix_multiply(A=b, B=a)
639    assert str(excinfo.value) == 'Nonconformable matrices!'
640
641    with pytest.raises(ValueError) as excinfo:
642        m.matrix_multiply(B=a, A=b)
643    assert str(excinfo.value) == 'Nonconformable matrices!'
644
645
646@pytest.requires_eigen_and_scipy
647def test_sparse():
648    assert_sparse_equal_ref(m.sparse_r())
649    assert_sparse_equal_ref(m.sparse_c())
650    assert_sparse_equal_ref(m.sparse_copy_r(m.sparse_r()))
651    assert_sparse_equal_ref(m.sparse_copy_c(m.sparse_c()))
652    assert_sparse_equal_ref(m.sparse_copy_r(m.sparse_c()))
653    assert_sparse_equal_ref(m.sparse_copy_c(m.sparse_r()))
654
655
656@pytest.requires_eigen_and_scipy
657def test_sparse_signature(doc):
658    assert doc(m.sparse_copy_r) == """
659        sparse_copy_r(arg0: scipy.sparse.csr_matrix[float32]) -> scipy.sparse.csr_matrix[float32]
660    """  # noqa: E501 line too long
661    assert doc(m.sparse_copy_c) == """
662        sparse_copy_c(arg0: scipy.sparse.csc_matrix[float32]) -> scipy.sparse.csc_matrix[float32]
663    """  # noqa: E501 line too long
664
665
666def test_issue738():
667    """Ignore strides on a length-1 dimension (even if they would be incompatible length > 1)"""
668    assert np.all(m.iss738_f1(np.array([[1., 2, 3]])) == np.array([[1., 102, 203]]))
669    assert np.all(m.iss738_f1(np.array([[1.], [2], [3]])) == np.array([[1.], [12], [23]]))
670
671    assert np.all(m.iss738_f2(np.array([[1., 2, 3]])) == np.array([[1., 102, 203]]))
672    assert np.all(m.iss738_f2(np.array([[1.], [2], [3]])) == np.array([[1.], [12], [23]]))
673
674
675def test_custom_operator_new():
676    """Using Eigen types as member variables requires a class-specific
677    operator new with proper alignment"""
678
679    o = m.CustomOperatorNew()
680    np.testing.assert_allclose(o.a, 0.0)
681    np.testing.assert_allclose(o.b.diagonal(), 1.0)
682