setdefault dict method caused non used Rank instantiation

[marcinwrobel1986]

TODO:

• change setdefault() method to if statement which will stop Rank instantiation without cause

Problem description:

• input data data/nolb-8color-16nodes-11firstphases/
• after putting print statement in the __init__() as follows:

      print(f"@@@ {self.__index}")
      print(f"@@@@@ {id(self)}")

• the output only from 0 Rank:

  @@@ 0
  @@@@@ 139700003736880
  @@@ 0
  @@@@@ 139700003507600
  @@@ 0
  @@@@@ 139700003504912
  @@@ 0
  @@@@@ 139700003507504
  @@@ 0
  @@@@@ 139700003505296
  @@@ 0
  @@@@@ 139700003505776
  @@@ 0
  @@@@@ 139700003507408
  @@@ 0
  @@@@@ 139700003505680
  @@@ 0
  @@@@@ 139700003505872
  @@@ 0
  @@@@@ 139700003535312
  @@@ 0
  @@@@@ 139700003535024
  @@@ 0
  @@@@@ 139700003535168
  @@@ 0
  @@@@@ 139700003535264
  @@@ 0
  @@@@@ 139700003534880
  @@@ 0
  @@@@@ 139700003534688

• above proofs that the 0 Rank is instantiated many times, with id() function indicating each instance is a different object

[ppebay]

No longer relevant after PR #307