code: def test_unary(self):
      # Automatically define all individual unary tests
      for unary_op, x_range in self.unary_ops_vals:
          test_name = "test_%s" % unary_op.name
  
          def test():
              self._test_unary(unary_op, x_range)
  
          test.description = test_name
          yield test
  
imports: from __future__ import absolute_import, print_function, division
  import unittest
  import numpy
  import theano
  from theano.gof import FunctionGraph
  from theano import gof
  from theano.tests import unittest_tools
  from theano.scalar.basic import floats, float16, float32, float64, ints, int8, int32, complex64, uint8, ComplexError, IntDiv, TrueDiv, Composite, add, div_proxy, and_, eq, neq, invert, mul, Scalar, InRange, cast, constant, switch
  from theano.scalar.basic import true_div, inv, log, log2, log10, log1p, exp, exp2, expm1, sqrt, deg2rad, rad2deg, cos, arccos, sin, arcsin, tan, arctan, arctan2, cosh, arccosh, sinh, arcsinh, tanh, arctanh
label_desc: Use image node_id 4 for calling the test_upgrade_to_float obj's underlying member method code with example usage: obj.test_unary() without return types