Error Handling - Python Notebook

Introduction¶

Error handling is an essential part of programming in Python. It allows you to anticipate and manage errors that may occur during the execution of your code.

try:
    x = 5 / 0
except ZeroDivisionError:
    print("Error: Division by zero is not allowed!")

Error: Division by zero is not allowed!

Types of Errors¶

Built in¶

try:
    x = 5 / 2
except ZeroDivisionError:
    print("Error: Division by zero is not allowed!")
else:
    print("No errors occurred!")

No errors occurred!

try:
    x = 5 / 0
except ZeroDivisionError:
    print("Error: Division by zero is not allowed!")
finally:
    print("This code will always be executed!")

Error: Division by zero is not allowed!
This code will always be executed!

Custom exceptions¶

class CustomError(Exception):
    pass

try:
    raise CustomError("This is a custom error!")
except CustomError as e:
    print(f"Error: {e}")

Error: This is a custom error!