Using Constraints in Scripts

Sometime we require to align one object to another object or do some other kind of matching in our scripts. We can use dynamically created constraints in a script for such purpose and delete the constraint once we get the data. However, while using constraints in this way one should make sure that the object on which constraint is applied does not contain any animation curve. Because if animation curve already exists and constraint is applied then a pairBlend node is created which by default is turned off for the constraint.