code: def test_iter(self):
      self.tempfile()
      self.run_test(
          """
              def _iter(filename):
                  f = open(filename)
                  c = [l for l in f]
                  f.close()
                  return c""",
          self.filename,
          _iter=[str],
      )
  
imports: from tempfile import mkstemp
  from pythran.tests import TestEnv
  import unittest
  from pythran.typing import List
label_desc: Use image node_id 22 for calling the TestFile obj's underlying member method code with example usage: obj.test_iter() without return types