method one:
suite=unittest.TestSuite()
suite.addTest (class name (function name to run)) # The first test case
Method Two:
suite=unittest.TestSuite()
loader = unittest.TestLoader () # use cases loader
suite.addTest (loader.loadTestsFromTestCase (class name)) # can load all of the disposable test a class below
Method three:
suite=unittest.TestSuite()
loader=unittest.TestLoader()
suite.addTest (loader.loadTestsFromModule (module name)) # can load all of the disposable test a module below
run
runner=unittest.TextTestRunner()
runner.run(suite)