and, as, assert, break, class, continue, def, del, elif, else, except, False, finally, for, from, global, if, import, in, is, lambda, None, nonlocal, not, or, pass, raise, return, True, try, while, with, yield 13、在一个定义新...
In[11]:try:...:print(10/0)...:except:...:raiseRuntimeError("something is wrong")from None...:---RuntimeErrorTraceback(most recent call last)<ipython-input-11-1818bd8b9d31>in<module>2print(10/0)3except:--->4raiseRuntimeError("something is wrong")from None5RuntimeError:something...
示例代码: try: raise MyError #自己抛出一个异常 except MyError: print 'a error' raise ValueError,'invalid argument' 捕捉到的内容为: type = VauleError message = invalid argument 三、跟踪查看异常 发生异常时,Python能“记住”引发的异常以及程序的当前状态,Python还维护着traceback(跟踪)对象,其中含有异...
raise NameError('TitanJun') except NameError: print('NameError错误') raise # 错误信息: NameError错误 Traceback (most recent call last): File "../1-异常处理.py", line 97, in <module> raise NameError('TitanJun') NameError: TitanJun 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 1...
一、异常 异常就是在触发异常条件时(解释器或程序员)而采取相应的措施 c++中异常使用try, throw, catch等关键字,而python中使用try, raise, except等 二、标准异常 1、综述: python异常都是类,其中BaseException是所有异常的根基类 Excep
Python3的关键字有:and, as, assert, break, class, continue, def, del, elif, else, except, False, finally, for, from, global, if, import, in, is, lambda, None, nonlocal, not, or, pass, raise, return, True, try, while, with, yield ...
AttributeError: 尝试访问未知的对象属性 3.检测和处理异常 异常可以通过 try 语句来检测. 任何在 try 语句块里的代码都会被监测, 检查有无异常发生。try 语句有两种主要形式: try-except 和 try-finally . 这两个语句是互斥的, 也就是说你只能使用其中的一种. 一个 try 语句可以对应一个或多个 except 子句...
Python3的关键字有:and, as, assert, break, class, continue, def, del, elif, else, except, False, finally, for, from, global, if, import, in, is, lambda, None, nonlocal, not, or, pass, raise, return, True, try, while, with, yield ...
Python3的关键字有:and, as, assert, break, class, continue, def, del, elif, else, except, False, finally, for, from, global, if, import, in, is, lambda, None, nonlocal, not, or, pass, raise, return, True, try, while, with, yield ...
Python3的关键字有:and, as, assert, break, class, continue, def, del, elif, else, except, False, finally, for, from, global, if, import, in, is, lambda, None, nonlocal, not, or, pass, raise, return, True, try, while, with, yield ...