code: def test_open_append(self):
      filename = mkstemp()[1]
      self.run_test(
          """
              def _open_append(filename):
                  f = open(filename,"a")
                  f.write("azert")
                  f.close()""",
          filename,
          _open_append=[str],
      )
      with open(filename) as fd:
          # * 2 because it's opened by python then pythran
          self.assertEqual(fd.read(), "azert" * 2)
  
imports: from tempfile import mkstemp
  from pythran.tests import TestEnv
  import unittest
  from pythran.typing import List
label_desc: Use image node_id 6 for calling the TestFile obj's underlying member method code with example usage: obj.test_open_append() without return types