1__doc__ = u""" 2>>> try: exc() 3... except IndexError: 4... if IS_PY3: 5... print(isinstance(sys.exc_info()[1].__context__, ValueError)) 6... else: 7... print(True) 8True 9""" 10 11import sys 12IS_PY3 = sys.version_info[0] >= 3 13 14def exc(): 15 try: 16 raise ValueError 17 except ValueError: 18 raise IndexError 19