code: def get_function(self, dtype, transpose_A=False, slice_tensors=False):
      alpha = scalar(dtype=dtype)
      beta = scalar(dtype=dtype)
      A = matrix(dtype=dtype)
      x = vector(dtype=dtype)
      y = vector(dtype=dtype)
      if transpose_A:
          A_1 = A.T
      else:
          A_1 = A
      if slice_tensors:
          A_2 = A_1[:: -self.slice_step]
          x_2 = x[:: -self.slice_step]
          y_2 = y[:: -self.slice_step]
      else:
          A_2 = A_1
          x_2 = x
          y_2 = y
      return pytensor.function(
          [alpha, A, x, beta, y],
          self.gemv(y_2, alpha, A_2, x_2, beta),
          mode=self.mode,
      )
  
imports: from warnings import warn
  import numpy
  import pytest
  import pytensor
  import pytensor.tensor
  from pytensor.misc.safe_asarray import _asarray
  from pytensor.tensor.basic import AllocEmpty
  from pytensor.tensor.blas import Ger
  from pytensor.tensor.blas_c import CGemv, CGer, check_force_gemv_init
  from pytensor.tensor.blas_scipy import ScipyGer
  from pytensor.tensor.type import dmatrix, dvector, matrix, scalar, tensor, vector
  from tests import unittest_tools
  from tests.tensor.test_blas import BaseGemv, TestBlasStrides
  from tests.unittest_tools import OptimizationTestMixin
label_desc: Use image node_id 1 for calling the TestCGemvNoFlags obj's underlying member method code with example usage: obj.get_function(dtype, transpose_A, slice_tensors) and returns: pytensor