code: def make_H_from_C_N(C, N):
      return {
          (c1, c2): sum(1 for node in C[c1] if N[(node, c2)] == 0)
          for c1 in C
          for c2 in C
      }
  
file_path: networkx/networkx/algorithms/coloring/equitable_coloring.py
imports: from collections import defaultdict
  import networkx
label_desc: Use image node_id 5 for calling a global function with example usage: make_H_from_C_N(C, N) and returns: unknown