embed a model panel into script editor with xml attribute editor template in maya 2015

_.md

AEaddModelPanel.py

import maya.cmds as cmds
import maya.utils as mutils


def AEaddModelPanelModule(	plug, uiLabel, annot):
    paneLayoutName = cmds.paneLayout(h=300)
    modelPanel = "customModelPanel"
    if cmds.modelPanel(modelPanel, q=1, ex=1):
        cmds.modelPanel(modelPanel, e=1, p=paneLayoutName)
    else:
        cmds.modelPanel(modelPanel, label="ModelPanel Test", cam='persp')

    mutils.executeDeferred(
        lambda *x: cmds.modelPanel(modelPanel, e=1, menuBarVisible=0))
    cmds.setParent(u=1)

AEtransform.ctrl_grpTemplate.xml

<?xml version='1.0' encoding='UTF-8'?>
<templates>
    <template name="AEtransform">

        <attribute name="frameExtension" type="maya.long">
            <label>Frame Extension</label>
        </attribute>
        <attribute name="enumAttr" type="maya.enum">
            <label>Enum Attr</label>
        </attribute>
        <attribute name="imageName" type="maya.string">
            <label>Image Name</label>
        </attribute>

        <attribute name="dummy" type="maya.float">
            <label>Anything you want</label>
            <description language="cb">py.AEaddModelPanel.AEaddModelPanelModule</description>
        </attribute>

    </template>

    <view name="Custom" template="AEtransform">
        <property name="frameExtension"/>
        <property name="enumAttr"/>
        <property name="imageName"/>
        <property name="dummy"/>
    </view>
    
</templates>

create_example_scene.mel

createNode transform -n "ctrl_grp";
	addAttr -ci true -sn "imageName" -ln "imageName" -dt "string";
	addAttr -ci true -sn "frameExtension" -ln "frameExtension" -at "long";
	addAttr -ci true -sn "enumAttr" -ln "enumAttr" -min 0 -max 2 -en "Green:Blue:Red" 
		-at "enum";
	setAttr -k on ".imageName";
	setAttr -k on ".frameExtension";
	setAttr -k on ".enumAttr";