code: def test_get_edge_attributes():
      graphs = [
          nx.Graph(),
          nx.DiGraph(),
          nx.MultiGraph(),
          nx.MultiDiGraph(),
      ]
      for G in graphs:
          G = nx.path_graph(3, create_using=G)
          attr = "hello"
          vals = 100
          nx.set_edge_attributes(G, vals, attr)
          attrs = nx.get_edge_attributes(G, attr)
          assert len(attrs) == 2
  
          for edge in G.edges:
              assert attrs[edge] == vals
  
          default_val = vals
          G.add_edge(4, 5)
          deafult_attrs = nx.get_edge_attributes(
              G, attr, default=default_val
          )
          assert len(deafult_attrs) == 3
  
          for edge in G.edges:
              assert deafult_attrs[edge] == vals
  
imports: import random
  import pytest
  import networkx
  from networkx.utils import edges_equal, nodes_equal
label_desc: Use image node_id 8 for calling a global function with example usage: test_get_edge_attributes() without return types