I've found a solution:
def __init__(self):
a=0
self.fenetre = gtk.Window(gtk.WINDOW_TOPLEVEL)
[...]
self.v = vte.Terminal()
# self.v.connect ("child-exited", lambda term: gtk.main_quit()) # this is the line to change
self.v.connect ("child-exited", lambda term: self.copie(self, a)) # the redirection after the process is finish
self.v.show()
def download(self, a, donnees=None):
child_pid = self.v.fork_command(None, ['/bin/bash', "./pluzz.sh", adresse])
def copie(self, a, donnees=None):
print "FINISH"