code: def test_view_pygraphviz_callable_edgelabel(self):
      G = nx.complete_graph(3)
  
      def foo_label(data):
          return "foo"
  
      path, A = nx.nx_agraph.view_pygraphviz(
          G, edgelabel=foo_label, show=False
      )
      for edge in A.edges():
          assert edge.attr["label"] == "foo"
  
imports: import warnings
  import pytest
  import networkx
  from networkx.utils import edges_equal, graphs_equal, nodes_equal
label_desc: Use image node_id 13 for calling the TestAGraph obj's underlying member method code with example usage: obj.test_view_pygraphviz_callable_edgelabel() and returns: str