Plugin Hot-Reload by Cleaning sys.modules?

[IyadAhmed]

also a bit more info, it seems the “correct” way to modify sys.modules is already provided by

bpy.utils.register_submodule_factory

    # Snippet
    def unregister():
        from sys import modules
        for mod in reversed(submodules):
            mod.unregister()
            name = mod.__name__
            delattr(module, name.partition(".")[2])
            del modules[name]
        submodules.clear()

    return register, unregister