test_indexing.py 文件源码

def test_boolean_index_cast_assign(self):
        # Setup the boolean index and float arrays.
        shape = (8, 63)
        bool_index = np.zeros(shape).astype(bool)
        bool_index[0, 1] = True
        zero_array = np.zeros(shape)

        # Assigning float is fine.
        zero_array[bool_index] = np.array([1])
        assert_equal(zero_array[0, 1], 1)

        # Fancy indexing works, although we get a cast warning.
        assert_warns(np.ComplexWarning,
                     zero_array.__setitem__, ([0], [1]), np.array([2 + 1j]))
        assert_equal(zero_array[0, 1], 2)  # No complex part

        # Cast complex to float, throwing away the imaginary portion.
        assert_warns(np.ComplexWarning,
                     zero_array.__setitem__, bool_index, np.array([1j]))
        assert_equal(zero_array[0, 1], 0)