code: def test_bug_complext_10_august_09(self):
      v0 = dmatrix()
      v1 = basic._convert_to_complex128(v0)
  
      inputs = [v0]
      outputs = [v1]
      f = function(inputs, outputs)
      i = np.zeros((2, 2))
      assert (f(i) == np.zeros((2, 2))).all()
  
file_path: Theano/theano/tensor/tests/test_casting.py
imports: from __future__ import absolute_import, print_function, division
  import unittest
  from theano import function
  from theano.tensor.basic import _convert_to_int32, _convert_to_int8, _convert_to_int16, _convert_to_int64, _convert_to_float32, _convert_to_float64
  from theano.tensor import *
label_desc: Use image node_id 5 for calling the test_casting obj's underlying member method code with example usage: obj.test_bug_complext_10_august_09() without return types