code: def constructSimpleGraph(self, directed=False):
      g = Graph(4, [(0, 1), (0, 2), (1, 2), (1, 3), (2, 3)], directed)
      g.es["capacity"] = [4, 2, 10, 2, 2]
      return g
  
imports: import unittest
  from igraph import Cut, Graph, EdgeSeq, InternalError
  from itertools import combinations
  from random import randint
label_desc: Use image node_id 1 for calling the CutTests obj's underlying member method code with example usage: obj.constructSimpleGraph(directed) and returns: g