You can check the exception hierarchy here. Ignore the nay sayers."

But make sure to follow best practice number 9.

>>> python exception_short using if statement: 0.574051856995 using exception: 0.821137189865 So the presence of an exception increases run time by .3 seconds divided by 10,000,000. These classes are generally mapped to a specific business failure cases. And the stack trace tells you in which class, method, and line the exception was thrown.

Try and Except in Exception Handling. custom exceptions can be very useful if complex or specific information needs to be stored in exception instances; don't make new exception classes when the built-in ones have all the functionality you need; you don't need to raise an Exception as soon as it is constructed, this makes it easy to pre-define a set of allowed errors in one place - Kenneth Reitz "Simplicity is alway better than functionality." 03/30/2017; 2 minutes to read +4; In this article.NET provides a hierarchy of exception classes ultimately derived from the base class Exception.However, if none of the predefined exceptions meets your needs, you can create your own exception classes by deriving from the Exception class.. Note: Exception is the base class for all the exceptions in Python. How to download Google Images using Python; How to clear screen in python? When creating a custom exception class, … If you need to add additional information, you should catch the exception and wrap it in a custom one.

Let us try to access the array element whose index is out of bound and handle the corresponding exception. 10 Interesting Python Cool Tricks; howdoi in Python; How to print without newline in Python? In General Values "Build tools for others that you want to be built for you." We have been using handling java custom exceptions in our code for almost every industry standard application. How to create user-defined exceptions. Python Exception Handling Best Practices Always try to handle the exception in the code to avoid abnormal termination of the program. A "Best of the Best Practices" (BOBP) guide to developing in Python. - Pieter Hintjens "Fit the 90% use-case. The Best of the Best Practices (BOBP) Guide for Python. As explained in best practice #4, the exception message should describe the exceptional event. - Kenneth Reitz

In this post, I will suggest another approach which might make you more sense. Usual approach is to create some custom exception classes extending the base Exception class.

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