>>> availables = dir(unittest) >>> len(availables) 42 >>> availables[:3] ['BaseTestSuite', 'FunctionTestCase', 'SkipTest'] >>> import math >>> for i in range(math.ceil(len(availables) / 4)): ... print(' '.join(availables[i*4:i*4+4])) ... BaseTestSuite FunctionTestCase SkipTest TestCase TestLoader TestProgram TestResult TestSuite TextTestResult TextTestRunner _TextTestResult __all__ __builtins__ __