try: memoryview(b'a').itemsize except: print("SKIP") raise SystemExit try: from array import array except ImportError: print("SKIP") raise SystemExit for code in ['b', 'h', 'i', 'q', 'f', 'd']: print(memoryview(array(code)).itemsize) # 'l' varies depending on word size of the machine print(memoryview(array('l')).itemsize in (4, 8)) # shouldn't be able to store to the itemsize attribute try: memoryview(b'a').itemsize = 1 except AttributeError: print('AttributeError')