code: def add_edges(graph, targets, sources):
      for target in targets:
          for src in sources:
              edge = target, src
              if not graph.has_edge(*edge):
                  graph.add_edge(*edge)
  
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  from ...asttools import Visitor, visit_children
  import _ast
  from ...asttools.visitors.symbol_visitor import get_symbols
label_desc: Use image node_id 2 for calling a global function with example usage: add_edges(graph, targets, sources) without return types