code: def trivial_graph(create_using=None):
      """Return the Trivial graph with one node (with label 0) and no edges.
  
      .. plot::
  
          >>> nx.draw(nx.trivial_graph(), with_labels=True)
  
      """
      G = empty_graph(1, create_using)
      return G
  
imports: import itertools
  import numbers
  import networkx
  from networkx.classes import Graph
  from networkx.exception import NetworkXError
  from networkx.utils import nodes_or_number, pairwise
label_desc: Use image node_id 18 for calling a global function with example usage: trivial_graph(create_using) and returns: G