145     return None or (round-trip, undecided-common, undecided-missing)

   145     return None or (round-trip, undecided-common, undecided-missing)

   146     """

   146     """

   147     roundtrips = res["total-roundtrips"]

   147     roundtrips = res["total-roundtrips"]

   148     if roundtrips <= 1:

   148     if roundtrips <= 1:

   149         return None

   149         return None

   150     undecided_common = res["nb-ini_und-common"]

   153     undecided_common = res["nb-ini_und-common"]

   151     undecided_missing = res["nb-ini_und-missing"]

   154     undecided_missing = res["nb-ini_und-missing"]

   152     if undecided_common == 0:

   155     if undecided_common == 0:

   153         return None

   156         return None

   154     if undecided_missing == 0:

   157     if undecided_missing == 0:

   155         return None

   158         return None

   157 

   167 

   158 

   168 

   159 def end(*args, **kwargs):

   169 def end(*args, **kwargs):

   160     done.set()

   170     done.set()

   161 

   171