code: def test_should_sample_every_k_frame_with_predicate(self):
      col = TupleValueExpression("id")
      val = ConstantValueExpression(NUM_FRAMES // 2)
      predicate = ComparisonExpression(
          ExpressionType.COMPARE_GEQ, left=col, right=val
      )
      for k in range(2, 4):
          video_loader = DecordReader(
              file_url=self.video_file_url,
              sampling_rate=k,
              predicate=predicate,
          )
          batches = list(video_loader.read())
          value = NUM_FRAMES // 2
          start = value + k - (value % k) if value % k else value
          expected = self._batches_to_reader_convertor(
              create_dummy_batches(
                  filters=[i for i in range(start, NUM_FRAMES, k)],
                  is_from_storage=True,
              )
          )
      self.assertEqual(batches, expected)
  
      value = 2
      predicate_1 = ComparisonExpression(
          ExpressionType.COMPARE_GEQ,
          left=TupleValueExpression("id"),
          right=ConstantValueExpression(value),
      )
      predicate_2 = ComparisonExpression(
          ExpressionType.COMPARE_LEQ,
          left=TupleValueExpression("id"),
          right=ConstantValueExpression(8),
      )
      predicate = LogicalExpression(
          ExpressionType.LOGICAL_AND, predicate_1, predicate_2
      )
      for k in range(2, 4):
          video_loader = DecordReader(
              file_url=self.video_file_url,
              sampling_rate=k,
              predicate=predicate,
          )
          batches = list(video_loader.read())
          start = value + k - (value % k) if value % k else value
          expected = self._batches_to_reader_convertor(
              create_dummy_batches(
                  filters=[i for i in range(start, 8, k)],
                  is_from_storage=True,
              )
          )
      self.assertEqual(batches, expected)
  
imports: import unittest
  from test.util import FRAME_SIZE, NUM_FRAMES, create_dummy_batches, create_sample_video, file_remove
  import numpy
  import pytest
  from evadb.configuration.constants import EvaDB_ROOT_DIR
  from evadb.constants import AUDIORATE, IFRAMES
  from evadb.expression.abstract_expression import ExpressionType
  from evadb.expression.comparison_expression import ComparisonExpression
  from evadb.expression.constant_value_expression import ConstantValueExpression
  from evadb.expression.logical_expression import LogicalExpression
  from evadb.expression.tuple_value_expression import TupleValueExpression
  from evadb.readers.decord_reader import DecordReader
  from evadb.utils.generic_utils import try_to_import_decord
label_desc: Use image node_id 5 for calling the DecordLoaderTest obj's underlying member method code with example usage: obj.test_should_sample_every_k_frame_with_predicate() without return types