Switch between AXIS tabs with GladeVCP button?

from subprocess import Popen, PIPE
scanNumber = 0

def user_live_update():

    global scanNumber

    try:

        happy = hal.component_exists('gladevcp')

        if happy:

            if scanNumber == 0:

                if Popen('halcmd getp gladevcp.backplot',stdout=PIPE,shell=True).communicate()[0].strip() == 'TRUE':
                    root_window.tk.call('.pane.top.right','raise','preview')

                if Popen('halcmd getp gladevcp.probe',stdout=PIPE,shell=True).communicate()[0].strip() == 'TRUE':
                    root_window.tk.call('.pane.top.right','raise','user_0')

                if Popen('halcmd getp gladevcp.toolchange',stdout=PIPE,shell=True).communicate()[0].strip() == 'TRUE':
                    root_window.tk.call('.pane.top.right','raise','user_1')

                scanNumber = 1

            else:

                if Popen('halcmd getp gladevcp.file',stdout=PIPE,shell=True).communicate()[0].strip() == 'TRUE':
                    root_window.tk.call('.pane.top.right','raise','user_2')

                scanNumber = 0

    except Exception:

        traceback.print_exc()

import subprocess

class HandlerClass:

    def __init__(self, halcomp, builder, useropts):
        # make a class reference to builder 
        # (self.ANYTHING is available anywhere in the HandlerClas class)
        self.builder = builder

        # make a class reference to the open vcp_action
        self.open = builder.get_object('open')

        # change a property in the iconchooser so all programs show
        # this shouldn't be required - it's a bug
        #builder.get_object('file').set_property("filetypes", '*')

    # This is a callback function from the icon chooser selected in the GLADE signal editor
    # in GTK the first variable is always the widget that owned the signal that called this function
    # any other variables depend on the widget, in this case icon view sends the path

    def on_file_selected(self, widget, path):
        if path:
            print path
            subprocess.call('axis-remote %s' % path, shell=True)
            root_window.tk.call('.pane.top.right','raise','user_2')         <===== I added this line
 
# boiler code
def get_handlers(halcomp,builder,useropts):
    return [HandlerClass(halcomp,builder,useropts)] 

import subprocess

class HandlerClass:

    def __init__(self, halcomp, builder, useropts):
        # make a class reference to builder 
        # (self.ANYTHING is available anywhere in the HandlerClas class)
        self.builder = builder

        # make a class reference to the open vcp_action
        self.open = builder.get_object('open')

        # change a property in the iconchooser so all programs show
        # this shouldn't be required - it's a bug
        #builder.get_object('file').set_property("filetypes", '*')

    # This is a callback function from the icon chooser selected in the GLADE signal editor
    # in GTK the first variable is always the widget that owned the signal that called this function
    # any other variables depend on the widget, in this case icon view sends the path

    def on_file_selected(self, widget, path):
        if path:
            print path
            subprocess.call('axis-remote %s' % path, shell=True)
            # switch tab by 'clicking' button
            self.builder.get_object('BUTTON_NAME_HERE').emit('clicked')
 
# boiler code
def get_handlers(halcomp,builder,useropts):
    return [HandlerClass(halcomp,builder,useropts)] 

f Popen('halcmd getp gladevcp.backplot',stdout=PIPE,shell=True).communicate()[0].strip() == 'TRUE':
                    root_window.tk.call('.pane.top.right','raise','preview')