code: def test_containing_list(self):
      # printing square brackets directly would be ambiguuous
      arr1d = np.array([None, None])
      arr1d[0] = [1, 2]
      arr1d[1] = [3]
      assert_equal(
          repr(arr1d), "array([list([1, 2]), list([3])], dtype=object)"
      )
  
imports: import sys
  import gc
  from hypothesis import given
  from hypothesis.extra import numpy
  import pytest
  import numpy
  from numpy.testing import assert_, assert_equal, assert_raises, assert_warns, HAS_REFCOUNT, assert_raises_regex
  from numpy.core.arrayprint import _typelessdata
  import textwrap
label_desc: Use image node_id 6 for calling the TestArrayRepr obj's underlying member method code with example usage: obj.test_containing_list() without return types