# All the code below, comes from a class named "inventory" which is the "main" class of the app.

	# Creating the picker button
	self.dep_button = hildon.PickerButton(gtk.HILDON_SIZE_AUTO,
                                        hildon.BUTTON_ARRANGEMENT_VERTICAL)
        self.dep_button.set_title("Département")
        
	# Creating the actual TouchSelector widget and connecting the "changed" 	        
        self.selector = hildon.TouchSelectorEntry(text=True)
        self.selector.connect("changed", self.selection_changed)
        
  
      
	# Reading a CSV file containing somes informations....
        cr = csv.reader(open("/usr/share/inventaire/departements.csv","rb"))
        for row in cr:
            #print row[1]+row[0]
            self.selector.append_text(row[2]+" - "+row[1])
        
       
        # Attach the touch selector to the picker button
        self.bottom_bar = self.interface.get_object("bottom_bar")
        self.bottom_bar.add(self.dep_button)
        self.dep_button.set_selector(self.selector)


    def selection_changed(self, column, user_data):
        
	# Deactivated the append_text because i thought it could be the cause of the self "self-replicating" signal
        #self.selector.append_text("LOOOOOOOOOOOOOOOOOOOOOOL")
        #print user_data
	# Begining of the signal event        
	print "a"
        print "b"
	# End of the signal event

a
b
a
b
a
b

python bug.py

#!/usr/bin/python
# -*- coding: utf-8 -*-

import gtk

import pygtk

import hildon


class inventory:
    def __init__(self):
        
        self.main_window = hildon.StackableWindow()
        self.dep_button = hildon.PickerButton(gtk.HILDON_SIZE_AUTO,
                                        hildon.BUTTON_ARRANGEMENT_VERTICAL)
        self.dep_button.set_title("test")
        self.selector = hildon.TouchSelectorEntry(text=True)
        self.selector.connect("changed", self.selection_changed)
        
        for i in range(5):
            self.selector.append_text(str(i))
        
        self.main_window.add(self.dep_button)
        self.dep_button.set_selector(self.selector)

        self.main_window.show_all()

    def selection_changed(self, column, user_data):
        print "Begining the signal event"
        print "End of the signal event"
        
        
if __name__ == "__main__":
    inventory()
    gtk.main()