How can I add keyframes to custom properties with python? Usually, I can use the function


but I couldn't find the right data_path of a custom property.

  • $\begingroup$ Thanks ideasman42, it works perfectly. Never used StackExchenge and it is difficult for me to not at least thank you for your efficient help. But I didn't found where is the best place to put this thanks... $\endgroup$
    – Salvatore
    Oct 11, 2013 at 13:16
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    $\begingroup$ You can thank ideasman42 by accepting the answer. Just click the 'v' and it turns green :) $\endgroup$
    – jasperge
    Feb 19, 2014 at 0:13
  • $\begingroup$ you are right, it's done. $\endgroup$
    – Salvatore
    Feb 20, 2014 at 20:17

1 Answer 1


Keyframes on custom properties use Python's getitem/setitem syntax rather then getattr/setattr.

This matches python api, where you would access object.location as an attribute and object["prop"] for a custom property.

So you would need to write it like this:


Note that you have to use " quotes, not ',
'["prop"]' can be written as "[\"prop\"]" too of course.

I think we have this documented, I'll have to double check though.


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