code: def test_ifilter_on_empty_sequence(self):
      self.run_test(
          "def ifilter_empty(l0): return list(filter(lambda x: x, l0))",
          [],
          ifilter_empty=[List[int]],
      )
  
imports: from pythran.tests import TestEnv
  import unittest
  import numpy
  from pythran.typing import List, NDArray
label_desc: Use image node_id 9 for calling the TestItertools obj's underlying member method code with example usage: obj.test_ifilter_on_empty_sequence() without return types