Blender - Make all materials of selected object(s) alpha hashed

import bpy

# Check if there is an active object and if it has materials
if bpy.context.object and bpy.context.object.material_slots:
    obj = bpy.context.object

    # Iterate over all material slots in the selected object
    for slot in obj.material_slots:
        mat = slot.material
        if mat:
            # Assign blend_method HASHED to each material
            mat.blend_method = 'HASHED'
else:
    print("No object selected or the selected object has no materials.")