code: def test_astype_uint(self):
      arr = timedelta_range("1h", periods=2)
  
      with pytest.raises(TypeError, match=r"Do obj.astype\('int64'\)"):
          arr.astype("uint64")
      with pytest.raises(TypeError, match=r"Do obj.astype\('int64'\)"):
          arr.astype("uint32")
  
file_path: pandas/pandas/tests/indexes/timedeltas/methods/test_astype.py
imports: from datetime import timedelta
  import numpy
  import pytest
  import pandas
  from pandas import Index, NaT, Timedelta, TimedeltaIndex, timedelta_range
  import pandas._testing
  from pandas.core.arrays import TimedeltaArray
label_desc: Use image node_id 4 for calling the TestTimedeltaIndex obj's underlying member method code with example usage: obj.test_astype_uint() without return types