# Editing Lamp Strength with Python

I am trying to animate changing brightness of a point lamp using input data that I have. However, when I try to access the lamp's strength using

bpy.data.node_groups["Shader Nodetree"].nodes["Emission"].inputs[1].default_value


I get the error message:

Traceback (most recent call last):
File "<blender_console>", line 1, in <module>

Yes, reach node_tree through lamp object bpy.data.lamps['lamp name'].node_tree.nodes.
• This works great! I'm now trying to add keyframes for the changing lamp strength, what should go in the data_path parameter? – wjkaufman Oct 4 '15 at 22:17