ViSUSpy

Initialization

 IdxModule.attach()
 unittest.main(exit=False)
 IdxModule.detach()

Write data to an IDX file

   dataset_box=NdBox(NdPoint(0,0,0),NdPoint.one(16,16,16))
   
   idxfile=IdxFile();
   idxfile.box=NdBox(dataset_box)
   idxfile.fields.push_back(Field("myfield",DType.fromString("uint32")))
   bSaved=idxfile.save(self.filename)
   self.assertTrue(bSaved)
   
   dataset=Dataset.loadDataset(self.filename)
   self.assertIsNotNone(dataset)
   access=dataset.get().createAccess()
   
   sampleid=0
   
   for Z in range(0,16):
     slice_box=dataset.get().getBox().getZSlab(Z,Z+1)
     
     query=QueryPtr(Query(dataset.get(),ord('w')))
     query.get().position=Position(slice_box)
     
     self.assertTrue(dataset.get().beginQuery(query))
     self.assertEqual(query.get().nsamples.innerProduct(),16*16)
     
     buffer=Array(query.get().nsamples,query.get().field.dtype)
     query.get().buffer=buffer
     
     fill=convertToNumPyArray(buffer)
     for Y in range(16):
       for X in range(16):
         fill[Y,X]=sampleid
         sampleid+=1
     success = dataset.get().executeQuery(access,query)

Read from IDX file

   dataset=Dataset_loadDataset(self.filename)
   self.assertIsNotNone(dataset)
   box=dataset.get().getBox()
   field=dataset.get().getDefaultField()
   access=dataset.get().createAccess()
   
   sampleid=0
   for Z in range(0,16):
     slice_box=box.getZSlab(Z,Z+1)
     
     query=QueryPtr(Query(dataset.get(),ord('r')))
     query.get().position=Position(slice_box)
     
     self.assertTrue(dataset.get().beginQuery(query))
     self.assertEqual(query.get().nsamples.innerProduct(),16*16)
     self.assertTrue(dataset.get().executeQuery(access,query))
     
     check=convertToNumPyArray(query.get().buffer)
     for Y in range(16):
       for X in range(16):
         self.assertEqual(check[Y,X],sampleid)
         sampleid+=1