code: def test_data_nested(self):
      a = Tensor([[1, 2], [3, 4]], dtype=dtypes.int32)
      dat = a.data()
      assert dat.format == "i"
      assert dat.itemsize == 4
      assert dat.tolist() == [[1, 2], [3, 4]]
      assert dat.shape == (2, 2)
      assert dat[0, 0] == 1
      assert dat[1, 1] == 4
  
file_path: tinygrad/test/test_tensor_data.py
imports: import unittest
  from tinygrad import Tensor, dtypes
label_desc: Use image node_id 3 for calling the TestTensorData obj's underlying member method code with example usage: obj.test_data_nested() without return types