code: def test_PandasDataset_init_with_all_formats(get_data, my_series):
      dataset = pandas.PandasDataset(dataframes=get_data(my_series))
      assert len(dataset)
      for i in dataset:
          assert isinstance(i, dict)
  
imports: import io
  from typing import Callable, List, Union
  import pandas
  import numpy
  import pytest
  from gluonts.dataset import pandas
  from gluonts.testutil.equality import assert_recursively_equal
label_desc: Use image node_id 5 for calling a global function with example usage: test_PandasDataset_init_with_all_formats(get_data, my_series) without return types