Python Exception Handling
Last updated
Last updated
Welcome to ! In this tutorial, we will explore the concept of exception handling in Python. We'll cover what exceptions are, how to handle them, and provide detailed examples to illustrate its application.
Introduction to Exceptions
Why Use Exception Handling?
Types of Exceptions
The try
and except
Blocks
Handling Multiple Exceptions
The else
and finally
Blocks
Raising Exceptions
Custom Exceptions
Practical Examples
Summary
Exceptions are events that occur during the execution of a program that disrupt the normal flow of instructions. They are typically errors that need to be addressed to prevent the program from crashing.
Exceptions indicate errors and exceptional conditions in the program.
Python provides a robust mechanism to handle exceptions gracefully.
Prevent Crashes: Exception handling prevents the program from terminating unexpectedly.
Debugging: It helps in debugging by providing detailed error messages.
Graceful Degradation: It allows the program to continue execution or fail gracefully.
Python has many built-in exceptions, such as:
SyntaxError
TypeError
IndexError
KeyError
ValueError
ZeroDivisionError
try
and except
BlocksThe try
block allows you to test a block of code for errors. The except
block lets you handle the error.
You can handle multiple exceptions by specifying multiple except
blocks.
except
Block for Multiple Exceptionselse
and finally
Blockselse
BlockThe else
block is executed if no exceptions are raised in the try
block.
finally
BlockThe finally
block is executed regardless of whether an exception occurs or not.
You can raise an exception using the raise
statement.
You can create custom exceptions by defining a new class that inherits from the built-in Exception
class.
In this tutorial, we explored the concept of exception handling in Python, its importance, and how to implement it using try
, except
, else
, and finally
blocks. We also covered raising exceptions, creating custom exceptions, and practical examples to illustrate the application of exception handling. Exception handling is a powerful feature that enhances code robustness, readability, and maintainability.
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