code: def verify_coloring(graph, coloring):
      for node in graph.nodes():
          if node not in coloring:
              return False
  
          color = coloring[node]
          for neighbor in graph.neighbors(node):
              if coloring[neighbor] == color:
                  return False
  
      return True
  
imports: import itertools
  import pytest
  import networkx
label_desc: Use image node_id 1 for calling a global function with example usage: verify_coloring(graph, coloring) and returns: True, False, False