python异常

import os

try:
    os.rmdir('aaa')
except Exception as e:
    print(e)

try:
    os.rmdir('aaa')
except Exception as e:
    print(e)
    raise
finally:
    print('last')


try:
    os.rmdir('aaa')
except Exception as e:
    print(e)
    raise
else:
    print('last')