code: def degree_histogram(G):
      """Returns a list of the frequency of each degree value.
  
      Parameters
      ----------
      G : Networkx graph
         A graph
  
      Returns
      -------
      hist : list
         A list of frequencies of degrees.
         The degree values are the index in the list.
  
      Notes
      -----
      Note: the bins are width one, hence len(list) can be large
      (Order(number_of_edges))
      """
      counts = Counter(d for n, d in G.degree())
      return [counts.get(i, 0) for i in range(max(counts) + 1)]
  
imports: from collections import Counter
  from itertools import chain
  import networkx
  from networkx.utils import not_implemented_for, pairwise
label_desc: Use image node_id 8 for calling a global function with example usage: degree_histogram(G) and returns: unknown