def test_slicing():
data = Frame(create_test_data(grad=True))
f1 = FrameRef(data, index=toindex(slice(1, 5)))
f2 = FrameRef(data, index=toindex(slice(3, 8)))
# test read
for k, v in f1.items():
assert F.allclose(F.narrow_row(data[k].data, 1, 5), v)
f2_a1 = f2['a1'] # is a tensor
# test write
f1[Index(F.tensor([0, 1]))] = {
'a1': F.zeros([2, D]),
'a2': F.zeros([2, D]),
'a3': F.zeros([2, D]),
}
assert F.allclose(f2['a1'], f2_a1)
f1[Index(F.tensor([2, 3]))] = {
'a1': F.ones([2, D]),
'a2': F.ones([2, D]),
'a3': F.ones([2, D]),
}
F.narrow_row_set(f2_a1, 0, 2, 1)
assert F.allclose(f2['a1'], f2_a1)
f1[toindex(slice(2, 4))] = {
'a1': F.zeros([2, D]),
'a2': F.zeros([2, D]),
'a3': F.zeros([2, D]),
}
F.narrow_row_set(f2_a1, 0, 2, 0)
assert F.allclose(f2['a1'], f2_a1)
def test_sharing():
data = Frame(create_test_data())
f1 = FrameRef(data, index=toindex([0, 1, 2, 3]))
f2 = FrameRef(data, index=toindex([2, 3, 4, 5, 6]))
# test read
for k, v in f1.items():
assert F.allclose(F.narrow_row(data[k].data, 0, 4), v)
for k, v in f2.items():
assert F.allclose(F.narrow_row(data[k].data, 2, 7), v)
f2_a1 = f2['a1']
# test write
# update own ref should not been seen by the other.
f1[Index(F.tensor([0, 1]))] = {
'a1': F.zeros([2, D]),
'a2': F.zeros([2, D]),
'a3': F.zeros([2, D]),
}
assert F.allclose(f2['a1'], f2_a1)
# update shared space should been seen by the other.
f1[Index(F.tensor([2, 3]))] = {
'a1': F.ones([2, D]),
'a2': F.ones([2, D]),
'a3': F.ones([2, D]),
}
F.narrow_row_set(f2_a1, 0, 2, F.ones([2, D]))
assert F.allclose(f2['a1'], f2_a1)