Error handling, also known as exception handling, is the process of detecting and responding to errors that occur during program execution. In Python, errors are represented as exceptions, which are objects that represent an abnormal condition or unexpected event.
Python provides several built-in mechanisms for handling exceptions, including the try, except, and finally statements. Here is an example of how to use these statements to handle exceptions:
try: # Some code that may raise an exception result = 1 / 0except ZeroDivisionError: # Handle the exception print("Error: Cannot divide by zero")finally: # This code will always run, regardless of whether an exception was raised print("Done") |
In this example, the try statement is used to enclose some code that may raise an exception. In this case, we are attempting to divide the number 1 by 0, which is not allowed and will raise a ZeroDivisionError exception.
If an exception is raised, the except statement will catch the exception and execute the code inside the block. In this case, we print an error message that indicates that the code attempted to divide by zero.
The finally statement is used to execute code that should always run, regardless of whether an exception was raised. In this example, we simply print a message that indicates that the program is done.
Python also provides the ability to create custom exceptions using the raise statement. This allows you to define your own exception types and handle them in a consistent manner throughout your program.