code: def _replacing_exec(self, code_string, ns):
      co = compile(code_string, "<string>", "exec")
      co = self._recursive_replace(co)
      exec(co, ns)
  
imports: import doctest
  import textwrap
  import types
  import unittest
label_desc: Use image node_id 51 for calling the ListComprehensionTest obj's underlying member method code with example usage: obj._replacing_exec(code_string, ns) without return types