How can I add drivers for custom properties?

Question

Suppose that obj is a object. If I want to add a driver for its scale X, I can do

d = obj.driver_add("scale", 0).driver

but if obj has the custom property var, the following

d = obj.driver_add("var").driver

gives an error:

Traceback (most recent call last):
  File "<blender_console>", line 1, in <module>
TypeError: bpy_struct.driver_add(): property "var" not found

How do I add a driver in this case?

score 4 · Accepted Answer · answered Sep 03 '16 at 05:00

4

The datapath for a custom property is '["propname"]'

obj["prop"] = 34
obj.driver_add('["prop"]')

answered Sep 03 '16 at 05:00

batFINGER

1

Wow you posted your answer almost at the same time when I posted mine – Henricus V. Sep 03 '16 at 05:01

score 1 · Answer 2 · answered Sep 03 '16 at 05:00

1

Solution:

d = obj.driver_add("[\"var\"]").driver

answered Sep 03 '16 at 05:00

Henricus V.

2 Answers2