code: def test_lambda(self):
      source = """a = 1
  foo = lambda b:  a + b
  """
      self.assertDepends(source, {("foo", "a")})
  
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  import unittest
  import ast
  from ...asttools.visitors.graph_visitor import GraphGen
  from ...asttools.visitors.graph_visitor import DiGraph
  from ...asttools.tests import AllTypesTested, skip_networkx
label_desc: Use image node_id 33 for calling the Test obj's underlying member method code with example usage: obj.test_lambda() without return types