Hasta La Motion!

I’m attempting to streamline my work flow in nuke by using Python to change existing node parameters globally. In this case I have laid out various "Card3d" nodes and I want to change all the motion blur parameters in one fall swoop.

So here is what I’m inputting in the script editor:

c = nuke.allNodes( ‘Card3D’ )
c["motionblur"].setValue (2)
c["shutteroffset"].setValue (0)

this is what the script editor outputs:

c = nuke.allNodes( ‘Card3D’ )
c["motionblur"].setValue (2)
c["shutteroffset"].setValue (0)
# Result: Traceback (most recent call last):
File "<string>", line 2, in <module>
TypeError: list indices must be integers

I’m a noob when it comes to python so I’m in a bit over my head. What I gather from this is that my syntax is wrong and I can’t give allNodes a variable… atleast not the way I’ve written it. Any thoughts or suggestions would be greatly appreciated!