test__dynamicarray.py 文件源码

def test_copy_from(self):
        a = DynamicArray(0, numpy.dtype([
            ('a', numpy.int8),
            ('b', numpy.float32),
            ('c', numpy.float64),
        ]))
        a.extend([
            (4, 3.932, 902.345),
            (7, 1.016, 548.229),
            (2, 0.542, 771.031),
            (8, 5.429, 858.063),
        ])
        b = DynamicArray(0, numpy.dtype([
            ('a', numpy.int8),
            ('c', numpy.float64),
        ]))
        b.copy_from(a.data)
        self.assertEqual(len(b), 4)
        self.assertEqual(b.data.tolist(), [(4, 902.345), (7, 548.229), (2, 771.031), (8, 858.063),])