Exception Handling in Python

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Introduction

In programming, errors are common. But what if a program stops running because of an error? That’s where exception handling helps. Exception handling allows a program to handle errors and continue running smoothly. If you're struggling with coding, you can always look for python assignment help to improve your skills.

What is an Exception?

An exception is an error that occurs during the execution of a program. When an error occurs, Python stops the program unless the error is handled properly.

Common Types of Exceptions in Python

Python has several types of exceptions. Some of the most common ones include:

Exception Type	Description
`ZeroDivisionError`	Occurs when a number is divided by zero.
`TypeError`	Happens when an operation is performed on an incorrect data type.
`ValueError`	Occurs when an incorrect value is used.
`IndexError`	Happens when an index is out of range in a list.
`KeyError`	Occurs when a key is not found in a dictionary.

How to Handle Exceptions in Python?

Python provides a way to handle exceptions using try-except blocks.

Example 1: Handling Division by Zero Error

try:

    num = 10 / 0

except ZeroDivisionError:

    print("You cannot divide by zero!")

Output:

You cannot divide by zero!

Example 2: Handling Multiple Exceptions

try:

    num = int("hello")

except ValueError:

    print("Invalid value entered!")

Output:

Invalid value entered!

Using `finally` Block

The finally block is used to execute code no matter what happens, whether an exception occurs or not.

try:

    file = open("example.txt", "r")

except FileNotFoundError:

    print("File not found!")

finally:

    print("This block executes no matter what.")

Output:

File not found!

This block executes no matter what.

Raising Exceptions

You can raise exceptions using the raise keyword.

def check_number(num):

    if num < 0:

        raise ValueError("Negative numbers are not allowed!")

    return num



try:

    check_number(-5)

except ValueError as e:

    print(e)

Output:

Negative numbers are not allowed!

Conclusion

Exception handling is an essential skill in Python programming. It helps prevent programs from crashing and makes debugging easier. Whether you're a beginner or an expert, learning exception handling will make your coding journey smoother. If you're struggling with your coding tasks, you can seek assignment help sydney to get better support.

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EXCEPTION HANDLING IN PYTHON

Exception Handling in Python