code: def setUp(self, dtype="float64"):
      # This tests can run even when theano.config.blas.ldflags is empty.
      self.dtype = dtype
      self.mode = theano.compile.get_default_mode().including(
          "fast_run"
      )
      self.A = tensor.tensor(dtype=dtype, broadcastable=(False, False))
      self.a = tensor.tensor(dtype=dtype, broadcastable=())
      self.x = tensor.tensor(dtype=dtype, broadcastable=(False,))
      self.y = tensor.tensor(dtype=dtype, broadcastable=(False,))
      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 __future__ import absolute_import, print_function, division
  import sys
  import numpy
  from unittest import TestCase
  from nose.plugins.skip import SkipTest
  import theano
  import theano.tensor
  from theano.tensor.blas_c import CGer
  from theano.tensor.blas_scipy import ScipyGer
  from theano.tensor.blas import Ger
  from theano.tensor.blas_c import CGemv
  from theano.tensor.blas import Gemv
  from theano.tensor.blas_c import check_force_gemv_init
  from theano.tests import unittest_tools
  from theano.tests.unittest_tools import TestOptimizationMixin
  from theano.tensor.tests.test_blas import BaseGemv, TestBlasStrides
label_desc: Use image node_id 1 for calling the TestCGer obj's underlying member method code with example usage: obj.setUp(dtype) without return types