import bpy

rig = bpy.data.objects["insurrectionist"]

## FIX PARENTS
def reparent(b: str, newParent: str = 'DEF-spine'):
    rig.data.edit_bones[b].parent = rig.data.edit_bones[newParent]
bpy.ops.object.mode_set(mode='EDIT')

pass

bpy.ops.object.mode_set(mode='POSE')