code: def test_nested_free_var_in_expr(self):
      code = """
              items = [(_C, [x for x in [1] if _C]) for _C in [0, 1]]
          """
      self._check_in_scopes(code, {"items": [(0, []), (1, [1])]})
  
imports: import doctest
  import textwrap
  import types
  import unittest
label_desc: Use image node_id 40 for calling the ListComprehensionTest obj's underlying member method code with example usage: obj.test_nested_free_var_in_expr() without return types