when a Python script encounters a situation that it cannot cope with, it raises an exception. An exception is a Python object that represents an error.
raise语句允许程序员强制发生特定的异常。raise中的唯一参数表示要引发的异常。这必须是异常实例或异常类(从异常派生的类) try: raise NameError("Hi there") # Raise Error except NameError: print ("An exception") 1. 2. 3. 4. 参考: https://www.geeksforgeeks.org/python-exception-handling/ 不要小...
Example: Exception Handling Using try...except try: numerator =10denominator =0result = numerator/denominatorprint(result)except:print("Error: Denominator cannot be 0.")# Output: Error: Denominator cannot be 0. Run Code In the example, we are trying to divide a number by0. Here, this code...
这个提前预防的动作称为异常处理(exception handling)。 总之异常处理就是为了防患于未然。 本帖的内容如下: try-except try-except-else try-except-else-finally 抛出Exception 总结 1 Try-Except 异常处理最常见的语句就是try-except组合,细分又有三种类型: 知道错误但不确定类型,用 except Exception 知道错误而且...
In a nutshell, exceptions let us jump out of arbitrarily large chunks of a program. 简而言之,异常让我们从一个程序中任意大的代码块中跳将出来。 2. Exception Roles异常充当的最常见的几种角色 Error handling 错误处理 Event notification 事件通知 ...
若except捕获异常后却并没有进行抛出,则可以使用单独的、不添加参数的raise语句抛出当前异常;若在except分支中使用raise [ErrorType]再抛出异常,则会报错During handling of the above exception, another exception occurred,并且会影响真正需要抛出的异常信息。若在raise抛出的异常中未添加有效的额外错误信息,则此种写法...
When an exception occurs, Python creates an exception object and stops the program unless the exception is handled. Common exceptions include ZeroDivisionError, TypeError, and FileNotFoundError. Handling Division by ZeroThis example demonstrates how to handle a division by zero error using a try-...
When exceptions occurs, if the exception type matches exception name after except keyword, then the code in that except clause is executed.note: The above code is only capable of handling IOError exception. To handle other kind of exception you need to add more except clause.A...
Exception Handling: Provides a flexible error-handling mechanism through try, except, else, and finally.多重异常处理：支持针对不同类型异常采取不同的处理措施，增强了程序的灵活性。 Multiple Exception Handling: Supports handling different types of exceptions with varying measures, enhancing program ...
During handling of the above exception, another exception occurred: 它的意思是:在处理上述异常期间,发生了另一个异常。简单理解就是在 except 中的代码出现了异常。所以导致了这种现象。这个例子就是在第三次循环的时候 person=1 然后字符串 hi 和1 不能进行拼接操作,然后再次引发了异常。查看所有的错误信息输...