code: def test_multiple_arcs(graphtype):
      g = graphtype(2, 1)
      g.add_node(2)
  
      g.add_edge(0, 1, 1, 2)
      g.add_edge(0, 1, 1, 2)
  
      v1 = g.get_edge(0, 1)
      v2 = g.get_edge(1, 0)
      print(
          "Final edge weight should be 1 resp. 2. Found {} resp. {}".format(
              v1, v2
          )
      )
  
file_path: medpy/lib/maxflow/src/sum_edge_test.py
imports: from maxflow import GraphDouble, GraphFloat, GraphInt
  import random
label_desc: Use image node_id 4 for calling a global function with example usage: test_multiple_arcs(graphtype) without return types