Path validation

filevalidation.py

def on_mkdir_clicked(self,widget):
        path1=self.entry1.get_text()
        if os.path.isabs(path1):
            print("valid path")
        else:
            print("invalid path")


        if not os.path.exists(path1):
            os.mkdir(path1)
            print path1
        else:
            dialog = Gtk.MessageDialog(self, 0, Gtk.MessageType.ERROR,Gtk.ButtonsType.CANCEL, "ERROR")
            dialog.format_secondary_text("File Already Exist,Or Invalid Path Name")
            dialog.run()
            dialog.destroy()
#           print("Directory exist")