code: def test_subscr_lvalue(self):
      source = "a[c] = b"
      self.assertDepends(
          source, {("a", "b"), ("a", "c")}, {"a", "b", "c"}, {"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 10 for calling the Test obj's underlying member method code with example usage: obj.test_subscr_lvalue() without return types