code: def test_cast():
      val = pa.scalar(5, type="int8")
      assert val.cast("int64") == pa.scalar(5, type="int64")
      assert val.cast("uint32") == pa.scalar(5, type="uint32")
      assert val.cast("string") == pa.scalar("5", type="string")
      with pytest.raises(ValueError):
          pa.scalar("foo").cast("int32")
  
imports: import datetime
  import decimal
  import pytest
  import sys
  import weakref
  import numpy
  import pyarrow
  import pyarrow.compute
  from pyarrow.tests import util
label_desc: Use image node_id 16 for calling a global function with example usage: test_cast() without return types