blender_unity_fixer_batch.py

import bpy

def rename(name):
    return name.replace(" ", "_").replace(".", "_")

for object in bpy.context.blend_data.objects:

    #Object
    object.name = rename(object.name)

    #Bones
    if object.type == "ARMATURE":
        bones = object.data.bones
        for b in bones:
            b.name = rename(b.name)

    #Curve Converter
    if "names" in object.keys():
        object["names"] = rename(object["names"])

bpy.ops.wm.save_mainfile()