Blender python addon code making a new window

 To create a new window in Blender using Python, you can use the bpy.ops.wm.window_new() operator. This operator will create a new top-level window in Blender, which you can then use to display your own custom user interface.

Here's an example of how you might use this operator in a Blender Python addon:

import bpy

class MyAddonPanel(bpy.types.Panel):

    """Creates a panel in the Object properties window"""

    bl_label = "My Addon Panel"

    bl_idname = "OBJECT_PT_my_addon_panel"

    bl_space_type = 'PROPERTIES'

    bl_region_type = 'WINDOW'

    bl_context = "object"

    def draw(self, context):

        layout = self.layout

        # Add a button to create a new window

        layout.operator("wm.window_new")

def register():

    bpy.utils.register_class(MyAddonPanel)

def unregister():

    bpy.utils.unregister_class(MyAddonPanel)

if __name__ == "__main__":

    register()

This code defines a panel class called MyAddonPanel, which includes a button that will create a new top-level window when clicked. To display this panel in Blender, you will need to register it using the register() function and then add it to a user interface layout, such as a panel or a menu.

You can then use the bpy.context.window_manager.windows attribute to access a list of all the top-level windows in Blender, and the bpy.context.window attribute to access the currently active window. You can use these attributes to manipulate the new window and add your own custom user interface elements to it.

For more information on creating and manipulating windows in Blender using Python, you can refer to the Blender Python API documentation.