见https://mozillazg.com/2016/08/python-the-right-way-to-catch-exception-then-reraise-another-exception.html#hidpython-2
RuntimeError: No active exception to reraise >>> raise ZeroDivisionError Traceback (most recent call last): File "<pyshell#0>", line 1, in <module> raise ZeroDivisionError ZeroDivisionError >>> raise ZeroDivisionError("除数不能为零") Traceback (most recent call last): File "<pyshell#2>"...
raise Exception(“Invalid level!”, level) 错误是class的一个实例,可以通过定义错误类,用raise抛出错误实例。 # err_raise.pyclass FooError(ValueError): pass def foo(s): n = int(s) if n==0: raise FooError('invalid value: %s' % s) return 10 / n foo('0') 1. 2. 3. 4. 5. 6. ...
1.1 raise用法 raise [异常名称 [(异常描述)]]1.2 描述 1.3 raise默认抛出RuntimeError 示例 >>>raiseTraceback (mostrecentcalllast):File"<pyshell#29>", line1, in<module>raiseRuntimeError: Noactiveexceptiontoreraise 1.4 raise抛出指定异常 示例 >>>raiseIndexErrorTraceback (mostrecentcall...
raise except RuntimeError as e: print("引发异常:",repr(e)) 程序执行结果为: 输入一个数:a 引发异常: RuntimeError('No active exception to reraise',) 睿科知识云的博客_CSDN博客-Python基础教程,Python入门教程(非常详细),C++入门教程,C++基础教程,Django框架教程(非常细)领域博主blog.csdn.net/ccc...
Reraise exception after doing some additional processing: A common use case of raise is to reraise an active exception after performing some operations. A good example of this use case is when you need to log the error before raising the actual exception. Some programming languages, such as ...
Python 异常处理机制提供了手动抛出异常的 raise 语句,语法格式如下: raise [exceptionName [(reason)]] 解释说明: (1) raise:raise 后不带参数,引发当前上下文中捕获的异常(也可以在 except 块中),或默认引发 RuntimeError 异常; (2) raise 异常类名称:raise 后带一个异常类名称,表示引发执行类型的异常; ...
@retry(reraise=True, stop=stop_after_attempt(3)) def raise_my_exception(): raise MyException("Fail") try: raise_my_exception() except MyException: # timed out retrying pass 6、重试前后和记录 before重试之前: import logging logging.basicConfig(stream=sys.stderr, level=logging.DEBUG) logger =...
deftest_retry1():print("等待重试...")raise Exception # 通过raise直接返回一个错误 @retry deftest_retry2():print("等待重试...")return"hello"+1# 人为制造一个错误,这里我是把字符串和整数相加,因为类型不同,肯定会报错,所以会触发重试 上述2段...
上面三种用法最终都是要引发一个异常实例(即使指定的是异常类,实际上也是引发该类的默认实例),raise 语句每次只能引发一个异常实例。 例如: >>>raiseTraceback(most recent call last):File"<pyshell#1>", line1,in<module>raiseRuntimeError:Noactive exception to reraise ...