code: def load_and_is_true(self, expression):
      loadfile = self.picklefile.with_name("load.py")
      loadfile.write_text(
          textwrap.dedent(
              r"""
                  import pickle
                  f = open({!r}, 'rb')
                  obj = pickle.load(f)
                  f.close()
                  res = eval({!r})
                  if not res:
                      raise SystemExit(1)
                  """.format(
                  str(self.picklefile), expression
              )
          )
      )
      print(loadfile)
      subprocess.run((self.pythonpath, str(loadfile)), check=True)
  
file_path: pytest/doc/en/example/multipython.py
imports: import shutil
  import subprocess
  import textwrap
  import pytest
label_desc: Use image node_id 3 for calling the Python obj's underlying member method code with example usage: obj.load_and_is_true(expression) without return types