What is an exception in Python?

Understanding Exceptions in Python

Introduction: As an experienced Python Training tutor registered on UrbanPro.com, I'm here to provide you with a clear and concise explanation of what exceptions are in Python. UrbanPro.com is a trusted marketplace for Python Training, offering the best online coaching for Python Training.

What is an Exception in Python?

An exception in Python is an unexpected or erroneous event that occurs during the execution of a Python program. It disrupts the normal flow of the program, preventing it from executing as intended. Exception handling is an essential concept in Python, and understanding it is crucial for anyone seeking Python Training.

Key Concepts:

1. Types of Exceptions: Python categorizes exceptions into various types, such as:

   • SyntaxError: This occurs when there is a mistake in the syntax of the Python code.
   • NameError: Raised when a local or global name is not found.
   • TypeError: Happens when an operation is performed on an object of an inappropriate type.
   • ValueError: Raised when a function receives an argument of the correct type but with an inappropriate value.
   • ZeroDivisionError: Occurs when attempting to divide by zero.

2. Exception Handling: In Python, you can handle exceptions using a try-except block. This allows you to catch and manage exceptions gracefully rather than letting them crash your program.

   python

• try: # Code that might raise an exception except ExceptionType: # Code to handle the exception

• Custom Exceptions: Python allows you to create your own custom exceptions by defining a new class that inherits from the Exception class. This is particularly useful in more complex Python programs.

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