code: def manual_setup_method(self, dtype="float64"):
      # This tests can run even when pytensor.config.blas__ldflags is empty.
      self.dtype = dtype
      self.mode = pytensor.compile.get_default_mode().including(
          "fast_run"
      )
      self.A = tensor(dtype=dtype, shape=(None, None))
      self.a = tensor(dtype=dtype, shape=())
      self.x = tensor(dtype=dtype, shape=(None,))
      self.y = tensor(dtype=dtype, shape=(None,))
      self.Aval = np.ones((2, 3), dtype=dtype)
      self.xval = np.asarray([1, 2], dtype=dtype)
      self.yval = np.asarray([1.5, 2.7, 3.9], dtype=dtype)
  
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 2 for calling the TestCGer obj's underlying member method code with example usage: obj.manual_setup_method(dtype) without return types