code: def test_inout(self, dtype):
      f = getattr(self.module, self.fprefix + "_inout")
  
      a = np.array(list("abc"), dtype=dtype)
      f(a, "A")
      assert_array_equal(a, np.array(list("Abc"), dtype=a.dtype))
      f(a[1:], "B")
      assert_array_equal(a, np.array(list("ABc"), dtype=a.dtype))
  
      a = np.array(["abc"], dtype=dtype)
      f(a, "A")
      assert_array_equal(a, np.array(["Abc"], dtype=a.dtype))
  
imports: import pytest
  import textwrap
  from numpy.testing import assert_array_equal, assert_equal, assert_raises
  import numpy
  from numpy.f2py.tests import util
label_desc: Use image node_id 9 for calling the TestCharacter obj's underlying member method code with example usage: obj.test_inout(dtype) without return types