code: def test_rvalue_writelines(self):
      self.filename = mkstemp()[1]
      self.run_test(
          """def _rvalue_writelines(filename):\n open(filename,'a+').writelines(["azerty", "qsdfgh", "12345524"])""",
          self.filename,
          _rvalue_writelines=[str],
      )
  
imports: from tempfile import mkstemp
  from pythran.tests import TestEnv
  import unittest
  from pythran.typing import List
label_desc: Use image node_id 36 for calling the TestFile obj's underlying member method code with example usage: obj.test_rvalue_writelines() without return types