docstr: Test that a DatasetDict can be initialized without arguments.
docstr_tok: ["Test","that","a","DatasetDict","can","be","initialized","without","arguments","."]
code: def test_default_init(self):
      """Test that a DatasetDict can be initialized without arguments."""
      dset_dict = DatasetDict()
  
      assert dset_dict == {}
      assert dset_dict.info.type_id == "dict"
      assert dset_dict.info.py_type == "dict"
      assert dset_dict.bind.keys() == set()
      assert len(dset_dict) == 0
  
file_path: pennylane/tests/data/attributes/test_dict.py
imports: import pytest
  from pennylane.data.attributes import DatasetDict
label_desc: Use image node_id 1 for calling the TestDatasetDict obj's underlying member method code with example usage: obj.test_default_init() without return types