Modifying FCurve values on armature bones via python

Question

I have this script, which does what i need with object actions.

import bpy

y_scale = 10

try:
    for fcu in bpy.context.object.animation_data.action.fcurves:
        if fcu.data_path == "location":
            for kp in fcu.keyframe_points:
                kp.co.y *= y_scale
                kp.handle_left.y *= y_scale
                kp.handle_right.y *= y_scale
except TypeError:
    pass

But i actually need to do this with armature bones. Can somebody modify this script to make it work with bones on all actions presented in armature?