code: def testSelectCols(self):
      args = {
          "records": [",,", "4,5,6"],
          "record_defaults": [[1], [2]],
          "select_cols": [0, 1],
      }
      expected_out = [[1, 4], [2, 5]]
      self._test(args, expected_out)
  
imports: import numpy
  from tensorflow.python.eager import context
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import errors
  from tensorflow.python.ops import parsing_ops
  from tensorflow.python.platform import test
label_desc: Use image node_id 24 for calling the DecodeCSVOpTest obj's underlying member method code with example usage: obj.testSelectCols() without return types