code: def test_data_uint8(self):
      a = Tensor([1, 2, 3, 4], dtype=dtypes.uint8)
      dat = a.data()
      assert dat.format == "B"
      assert dat.itemsize == 1
      assert dat[0] == 1
      assert dat[1] == 2
  
file_path: tinygrad/test/test_tensor_data.py
imports: import unittest
  from tinygrad import Tensor, dtypes
label_desc: Use image node_id 2 for calling the TestTensorData obj's underlying member method code with example usage: obj.test_data_uint8() without return types