code: def test_default_scalar_container(self):
      # Similar in spirit to test_default_container, but updating a scalar
      # variable. This is a sanity check for non mutable types.
      x = shared(0.0, "x")
      f = pfunc([], x)
      assert f() == 0
      x.set_value(x.get_value(borrow=True) + 1, borrow=True)
      assert f() == 1
  
imports: import numpy
  import pytest
  import pytensor.tensor
  from pytensor.compile import UnusedInputError, get_mode
  from pytensor.compile.function import function, pfunc
  from pytensor.compile.function.pfunc import rebuild_collect_shared
  from pytensor.compile.io import In
  from pytensor.compile.sharedvalue import shared
  from pytensor.configdefaults import config
  from pytensor.graph.utils import MissingInputError
  from pytensor.misc.safe_asarray import _asarray
  from pytensor.tensor.math import sum
  from pytensor.tensor.type import bscalar, bvector, dmatrices, dmatrix, dscalar, dvector, fscalar, fvector, imatrix, iscalar, ivector, ivectors, lscalar, wvector
  from pytensor.utils import PYTHON_INT_BITWIDTH
label_desc: Use image node_id 6 for calling the TestPfunc obj's underlying member method code with example usage: obj.test_default_scalar_container() without return types