code: def test_train_loader_length(loader_factory):
      loader = loader_factory(get_dataset(), 1.0, 1.5)
  
      assert len(list(loader)) == NUM_BATCHES
  
imports: import itertools
  from functools import partial
  from typing import Iterable
  import numpy
  from pandas.tseries.frequencies import to_offset
  import pytest
  from gluonts.dataset.common import Dataset
  from gluonts.dataset.loader import DataBatch, InferenceDataLoader, TrainDataLoader
  from gluonts.mx.batchify import _pad_arrays, batchify, stack
  from gluonts.testutil.dummy_datasets import get_dataset
  from gluonts.transform import ContinuousTimeInstanceSplitter, ContinuousTimeUniformSampler, ContinuousTimePredictionSampler
label_desc: Use image node_id 3 for calling a global function with example usage: test_train_loader_length(loader_factory) without return types