code: def test_chrono_system_clock():
      from pybind11_tests import test_chrono1
      import datetime
  
      # Get the time from both c++ and datetime
      date1 = test_chrono1()
      date2 = datetime.datetime.today()
  
      # The returned value should be a datetime
      assert isinstance(date1, datetime.datetime)
  
      # The numbers should vary by a very small amount (time it took to execute)
      diff = abs(date1 - date2)
  
      # There should never be a days/seconds difference
      assert diff.days == 0
      assert diff.seconds == 0
  
      # We test that no more than about 0.5 seconds passes here
      # This makes sure that the dates created are very close to the same
      # but if the testing system is incredibly overloaded this should still pass
      assert diff.microseconds < 500000
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_chrono_system_clock() without return types