[Insight-users] Beginner question: accessing types in classes (python)

[Rick Giuly]

Hello all,

I'm attempting to write the FastMarching example from the ITK guide in 
python, and I have run into a problem.

Could someone inform me on what is the proper syntax, in python, for 
accessing a type (like NodeContainer) which is inside of a class (like 
FastMarchingImageFilter). I have my attempted guess at the syntax shown 
below but it did not seem to work.

Any help is appreciated

-Rick

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Abbreviated C++ code, from page 535-538 of the ITK software guide

typedef float InternalPixelType;
const unsigned int Dimension = 2;
typedef itk::Image< InternalPixelType, Dimension > InternalImageType;

typedef itk::FastMarchingImageFilter< InternalImageType,
InternalImageType > FastMarchingFilterType;

typedef FastMarchingFilterType::NodeContainer NodeContainer;

// trying to reproduce this line in python
NodeContainer::Pointer seeds = NodeContainer::New();


-------------------------------------
Code that I tried in python:


image_type = itk.Image[itk.F, 3]

seeds = 
itk.FastMarchingImageFilter[image_type,image_type].NodeContainer.New()


-------------------------------------
Error message I received:
Traceback (most recent call last):
   File 
"C:\data\m\eclipse_workspace\blobcenter\test_files\test_FastMarchingImageFilter.py", 
line 14, in <module>
     seeds = itk.FastMarchingImageFilter[image_type, 
image_type].NodeContainer.New()
AttributeError: type object 'itkFastMarchingImageFilterIF3IF3' has no 
attribute 'NodeContainer'