1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
|
import sys
try:
import numpy
except ImportError:
print("Numpy (http://numpy.scipy.org) not found.")
print("This test requires numpy!")
from vtk.test import Testing
Testing.skip()
import vtk
import vtk.numpy_interface.dataset_adapter as dsa
# Test getting an array associated with a dataset, creating a derived array in
# numpy and adding it back to the dataset. Verify that this doesn't create a
# cycle preventing the dataset from being collected.
source = vtk.vtkRTAnalyticSource()
source.Update()
dataset = dsa.DataSet(source.GetOutput())
data = dataset.PointData.GetArray(0)
# Create a derived array
newdata = numpy.int32(data)
# Add the derived array to the dataset
dataset.PointData.append(newdata, 'PleaseDontPinMe')
assert newdata.DataSet is not None
# Delete reference to the dataset
del dataset
del source
# The derived array reference to the dataset should now be None as it only held
# a weak reference to the original dataset
assert newdata.DataSet is None
|
