How to determine type of a datablock?

Coding Python Support
1

Hello,

How can I determine the type of the datablock from the list of selected objects? Also, how do I access multiple datablocks in the case that the object contains more than one?

Here is what I am currently doing, which is inelegant:


# go through selected objects and get their meshes, if they exist
for obj in Blender.Object.GetSelected():
    # get the datablock name
    dataName = obj.getData(True); # argument indicates string name is desired
    # get mesh from datablock name
    try: mesh = Mesh.Get( dataName )
    except NameError:
        print "WARNING: Non-mesh object [" + obj.name + "] selected!  Object ignored."
        continue
    print "Found mesh in selected object: " + str(mesh)

I would like to identify lamps and cameras separately and handle them differently without looping through the selected objects excessively.

Thank you in advance!

2

Note that the following works, but is also messy:

# go through selected objects and get their meshes, if they exist
for obj in Blender.Object.GetSelected():
    # get the datablock
    data = obj.getData(False,True); # get the data itself as a mesh, not its name
    # test datablock type
    isMesh = str( type( data ) ) == "<type 'Blender Mesh'>" # converts type to string for comparison
    print "Selected object contains mesh: " + str( isMesh )

How can this be done without converting the type to a string literal? The following always seems to result in False for a mesh:

isMesh = type( data ) == Mesh

Is ‘Mesh’ actually the wrong type for mesh datablocks?

3

Would this work?


isMesh = type( data ) == "Mesh"
4

Here’s what I do in a script I’m working on. I found this in the API docs, where they say it’s the recommended way of doing things. This is for type checking an image:


if type(image) is Blender.Types.ImageType:

Link to docs.