code: def sweepA(fitnesses, front):
      """Update rank number associated to the fitnesses according
      to the first two objectives using a geometric sweep procedure.
      """
      stairs = [-fitnesses[0][1]]
      fstairs = [fitnesses[0]]
      for fit in fitnesses[1:]:
          idx = bisect.bisect_right(stairs, -fit[1])
          if 0 < idx <= len(stairs):
              fstair = max(fstairs[:idx], key=front.__getitem__)
              front[fit] = max(front[fit], front[fstair] + 1)
          for i, fstair in enumerate(fstairs[idx:], idx):
              if front[fstair] == front[fit]:
                  del stairs[i]
                  del fstairs[i]
                  break
          stairs.insert(idx, -fit[1])
          fstairs.insert(idx, fit)
  
imports: import bisect
  from collections import defaultdict, namedtuple
  from itertools import chain
  import math
  from operator import attrgetter, itemgetter
  import random
  import numpy
label_desc: Use image node_id 11 for calling a global function with example usage: sweepA(fitnesses, front) without return types