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# try_except_else_finally 例子，如果没有错误发生，可以在except语句块后面加一个else，当没有错误发生时，会自动执行else语句：

try:
    print('try...')
    r = 10 / int('2')
    print('result:', r)
except ValueError as e:
    print('ValueError:', e)
except ZeroDivisionError as e:
    print('ZeroDivisionError:', e)
else:
    print('no error!')
finally:
    print('finally...')
print('END')