Maya dock window with cmds

import maya.cmds as mc

class BaseWindow(object):

    WINDOW_NAME = 'BaseWindow'
    WINDOW_TITLE = 'Base Window by PlanetaCG'
    WIDTH = 300
    HEIGHT = 600
    SCROLLABLE = True

    def __init__(self, dock=False, allowedAreas=('right', 'left')):
        """ """
        self.allowedAreas = allowedAreas
        self.dockable = dock
        self.CreateUI()

    def CreateUI(self):
        """ """
        if mc.window(self.WINDOW_NAME, exists=True):
            mc.deleteUI(self.WINDOW_NAME)

        # Window
        self.window = mc.window(self.WINDOW_NAME, title=self.WINDOW_TITLE, width=self.WIDTH, height=self.HEIGHT,
                           sizeable=True, minimizeButton=False, maximizeButton=False)
        mc.window(self.window, edit=True, width=self.WIDTH, height=self.HEIGHT)

        self.mainLayout = mc.columnLayout('mainLayout', width=self.WIDTH)

        self.contentLayout = self.mainLayout

        if self.SCROLLABLE:
            self.scrollLayout = mc.scrollLayout('scrollLayout', width=self.WIDTH, height=self.HEIGHT, parent=self.mainLayout)
            self.contentLayout = mc.columnLayout('contentLayout', width=self.WIDTH - 16, parent=self.scrollLayout)

        self.CreateCustomUI()

        if self.dockable:
            mc.dockControl(label=self.WINDOW_TITLE, area='right', content=self.window, allowedArea=self.allowedAreas)
        # mc.showWindow(self.window)

    def CreateCustomUI(self):
        """ """
        print 'BaseWindow.CreateCustomUI Override this function in child classes'


window = BaseWindow(dock=True)