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I'm trying to insert a keyframe via python to animate energy lamp but i get this TypeError:

o.keyframe_insert(data_path='energy', frame=5)
Traceback (most recent call last):
File "<blender_console>", line 1, in <module>
TypeError: bpy_struct.keyframe_insert() property "energy" not found

The data_path "energy" should be correct, as explained here how to find the data_path for scripted keyframes just rightclick the Energy property and select "Copy Data Path".

Distance property don't works too.

I tried this on several Blender version: 2.71, 2.74, 2.76b, 2.77

More: I added manually the energy lamp animation and by checking this value:

bpy.context.object.data.animation_data.action.fcurves[0].data_path

i get still the same value 'energy'

It's a bug or i'm doing it wrong? There is some workaround?

SOLVED

I was confused by the fact that the property color was animatable directly from the lamp object otherwise energy and distance can be animated by lamp.data

The correct code

o.data.keyframe_insert(data_path='energy', frame=5)
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Of the three choices my bet is that you're doing it wrong in that your o object is the lamp object, not the data part, or some other non LAMP data object.

import bpy
context = bpy.context
#o = bpy.data.objects.get("Lamp") # assumes you have an ob named Lamp
#o.data = bpy.data.lamps.get("Lamp")
o = context.active_object
if o:
    #o.energy 
    print("%s (%s)" % (o.name, o.type), getattr(o, "energy", "Has NO energy property"))
    o = o.data
    #o.data.energy
    if o:
        print("%s (%s)" % (o.name, o.type), getattr(o, "energy",  "Has NO energy property"))

If you grab a datapath from the DATA Properties panel, eg mesh panel for mesh objects, the datapath will be resolvable on the data part. context.active_object.data (except for empties, whose data part is None)

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