What are the 3 major exception types in Python?

IndexError. The IndexError is thrown when trying to access an item at an invalid index.

ModuleNotFoundError. The ModuleNotFoundError is thrown when a module could not be found.

KeyError. The KeyError is thrown when a key is not found.

ImportError.

StopIteration.

TypeError.

ValueError.

NameError.

What are the important exceptions in Python?

Python Built-in Exceptions

Exception	Cause of Error
EOFError	Raised when the input() function hits end-of-file condition.
FloatingPointError	Raised when a floating point operation fails.
GeneratorExit	Raise when a generator’s close() method is called.
ImportError	Raised when the imported module is not found.

What are custom exceptions?

Custom exceptions provide you the flexibility to add attributes and methods that are not part of a standard Java exception. These can store additional information, like an application-specific error code, or provide utility methods that can be used to handle or present the exception to a user.

What is the top most Python exception?

Exception is the most commonly-inherited exception type (outside of the true base class of BaseException ). In addition, all exception classes that are considered errors are subclasses of the Exception class.

What is exception in Python with example?

An exception is a Python object that represents an error. Python provides a way to handle the exception so that the code can be executed without any interruption. If we do not handle the exception, the interpreter doesn’t execute all the code that exists after the exception.

What is base exception Python?

The BaseException is the base class of all other exceptions. User defined classes cannot be directly derived from this class, to derive user defied class, we need to use Exception class. The Python Exception Hierarchy is like below.

What is exception explain exception handling in Python?

An exception can be defined as an unusual condition in a program resulting in the interruption in the flow of the program. Whenever an exception occurs, the program stops the execution, and thus the further code is not executed. Therefore, an exception is the run-time errors that are unable to handle to Python script.

Why exception handling is important in Python?

Here are the reasons for using exceptions in Python: Exception handling allows you to separate error-handling code from normal code. An exception is a Python object which represents an error. As with code comments, exceptions helps you to remind yourself of what the program expects.

How do we create custom exceptions?

Here are the steps:

Create a new class whose name should end with Exception like ClassNameException.
Make the class extends one of the exceptions which are subtypes of the java.
Create a constructor with a String parameter which is the detail message of the exception.

How can you create custom exceptions give an example?

Steps to create a Custom Exception with an Example

CustomException class is the custom exception class this class is extending Exception class.
Create one local variable message to store the exception message locally in the class object.
We are passing a string argument to the constructor of the custom exception object.

What is the super class of exception in Python?

exception BaseException This is the base class for all built-in exceptions. It is not meant to be directly inherited by user-defined classes. For, user-defined classes, Exception is used. This class is responsible for creating a string representation of the exception using str() using the arguments passed.

Which classes are exception classes in Python?

Python Exception Base Classes