code: def testSingle(self):
      x = numpy.arange(0, 10)
      for i in range(0, 10):
          numpy.testing.assert_equal(indexing_ext.single(x, i), i)
      for i in range(-10, 0):
          numpy.testing.assert_equal(indexing_ext.single(x, i), 10 + i)
  
file_path: turicreate/src/external/boost/boost_1_68_0/libs/python/test/numpy/indexing.py
imports: import unittest
  import numpy
  import indexing_ext
label_desc: Use image node_id 1 for calling the TestIndexing obj's underlying member method code with example usage: obj.testSingle() without return types