Install nose with setuptools:

$ [sudo] easy_install nose

Or pip:

$ [sudo] pip install nose

Apply one function as being a test and another as not being a test:

@setastest(False)
def test_false():
   pass

@setastest(True)
def test_true():
   pass

Skip tests with the @skipif decorator. Let's use a condition that always leads to a test being skipped:

@skipif(True)
def test_skip():
   pass

Add a test function that always passes. Then, decorate it with the @knownfailureif decorator so that the test always fails:

@knownfailureif(True)
def test_alwaysfail():
     pass

Define some test classes with methods that normally should be executed by nose:

class TestClass():
   def test_true2(self):
      pass

class TestClass2():
   def test_false2...