Notes:

• Comparison operators can be done:
  • ==, != test numeric values within epsilon
• Math can be performed on Quaternion classes
  • quat + quat
  • quat - quat
  • quat * float/int
  • quat * vec
  • quat * quat
• You can access a quaternion object like a sequence
  • x = quat[0]

Attention: Quaternion data can be wrapped or non-wrapped. When a object is wrapped it means that the object will give you direct access to the data inside of blender. Modification of this object will directly change the data inside of blender. To copy a wrapped object you need to use the object's constructor. If you copy and object by assignment you will not get a second copy but a second reference to the same data. Only certain functions will return wrapped data. This will be indicated in the method description. Example:

   wrappedObject = Object.getAttribute() #this is wrapped data
   print wrappedObject.wrapped #prints 'True'
   copyOfObject = Object(wrappedObject) #creates a copy of the object
   secondPointer = wrappedObject #creates a second pointer to the same data
   print wrappedObject.attribute #prints '5'
   secondPointer.attribute = 10
   print wrappedObject.attribute #prints '10'
   print copyOfObject.attribute #prints '5'

 quat = Quaternion(1,2,3,4)
 quat = Quaternion(axis, angle)