import bpy
from mathutils import *
from math import *

for objects in bpy.data.objects:
    for materialSlots in objects.material_slots:
        if not materialSlots.name:
            continue
        material = bpy.data.materials[materialSlots.name]
        material.shadow_method = 'NONE'	
        material.show_transparent_back = False
        if hasattr(material.node_tree, 'nodes'):
            nodes = material.node_tree.nodes
			if "Image Texture" in nodes:
                links = bpy.data.materials[materialSlots.name].node_tree.links	
                links.new(nodes['Principled BSDF'].inputs['Emission'], nodes['Image Texture'].outputs['Color'])
                nodes['Principled BSDF'].inputs['Emission Strength'].default_value = 0.3