code: def test_ctx_mgr(self):
      # test that context manager actually works
      with np.printoptions(precision=2):
          s = str(np.array([2.0]) / 3)
      assert_equal(s, "[0.67]")
  
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 1 for calling the TestContextManager obj's underlying member method code with example usage: obj.test_ctx_mgr() without return types