code: def test_default_updates_multiple(self):
      x = shared(0)
      y = shared(1)
  
      x.default_update = x - 1
      y.default_update = y + 1
  
      f1 = pfunc([], [x, y])
      f1()
      assert x.get_value() == -1
      assert y.get_value() == 2
  
      f2 = pfunc(
          [], [x, y], updates=[(x, (x - 2))], no_default_updates=[y]
      )
      f2()
      assert x.get_value() == -3
      assert y.get_value() == 2
  
      f3 = pfunc(
          [], [x, y], updates=[(x, (x - 2))], no_default_updates=True
      )
      f3()
      assert x.get_value() == -5
      assert y.get_value() == 2
  
      f4 = pfunc([], [x, y], updates=[(y, (y - 2))])
      f4()
      assert x.get_value() == -6
      assert y.get_value() == 0
  
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 23 for calling the TestPfunc obj's underlying member method code with example usage: obj.test_default_updates_multiple() without return types