[test] Fix precision test to be a bit softer on floating-point comparisons

bob/learn/libsvm/test_trainer.py

@@ -116,7 +116,7 @@ def test_training():
   previous = Machine(TEST_MACHINE_NO_PROBS)
   nose.tools.eq_(machine.machine_type, previous.machine_type)
   nose.tools.eq_(machine.kernel_type, previous.kernel_type)
-  nose.tools.eq_(machine.gamma, previous.gamma)
+  assert numpy.isclose(machine.gamma, previous.gamma)
   nose.tools.eq_(machine.shape, previous.shape)
   assert numpy.all(abs(machine.input_subtract - previous.input_subtract) < 1e-8)
   assert numpy.all(abs(machine.input_divide - previous.input_divide) < 1e-8)
@@ -150,7 +150,7 @@ def test_training_with_probability():
   previous = Machine(HEART_MACHINE)
   nose.tools.eq_(machine.machine_type, previous.machine_type)
   nose.tools.eq_(machine.kernel_type, previous.kernel_type)
-  nose.tools.eq_(machine.gamma, previous.gamma)
+  assert numpy.isclose(machine.gamma, previous.gamma)
   nose.tools.eq_(machine.shape, previous.shape)
   assert numpy.all(abs(machine.input_subtract - previous.input_subtract) < 1e-8)
   assert numpy.all(abs(machine.input_divide - previous.input_divide) < 1e-8)
@@ -198,7 +198,7 @@ def test_training_one_class():
   previous = Machine(TEST_MACHINE_ONE_CLASS)
   nose.tools.eq_(machine.machine_type, previous.machine_type)
   nose.tools.eq_(machine.kernel_type, previous.kernel_type)
-  nose.tools.eq_(machine.gamma, previous.gamma)
+  assert numpy.isclose(machine.gamma, previous.gamma)
   nose.tools.eq_(machine.shape, previous.shape)
   assert numpy.all(abs(machine.input_subtract - previous.input_subtract) < 1e-8)
   assert numpy.all(abs(machine.input_divide - previous.input_divide) < 1e-8)