code: def random_graph(size):
      return dgl.from_networkx(nx.erdos_renyi_graph(size, 0.3))
  
imports: from collections import defaultdict
  import backend
  import dgl
  import networkx
  import numpy
  import scipy.sparse
label_desc: Use image node_id 17 for calling a global function with example usage: random_graph(size) and returns: dgl