texteditor_Submenu.py

import bpy
import os
from bpy.props import EnumProperty


class SvTextSubMenu(bpy.types.Menu):
    bl_idname = "templates_submenu"
    bl_label = "Select"

    def avail_templates(self, context):
        sv_path = os.path.dirname(os.path.realpath(__file__))
        script_dir = "node_script_templates"
        path = os.path.join(sv_path, script_dir)
        items = [(t, t, "") for t in next(os.walk(path))[2]]
        return items

    files_popup = EnumProperty(
        items=avail_templates,
        name='template_files',
        description='choose file to load as template')

    def draw(self, context):
        layout = self.layout

        for i in [3,3,3,3]: #self.avail_templates(context):
            # print(i)
            layout.operator("object.select_all", text="Select/Deselect All")


def menu_draw(self, context):
    print('im called here')
    self.layout.menu("templates_submenu")


def register():
    # bpy.utils.register_module(__name__)
    bpy.types.TEXT_MT_format.append(menu_draw)


def unregister():
    # bpy.utils.register_module(__name__)
    bpy.types.TEXT_MT_format.remove(menu_draw)

if __name__ == "__main__":
    print('i am registered')
    register()