When should I use try, except, and finally in Python?

When should I use try, except, and finally in Python?

You should use try to wrap code that might raise an exception, except to handle those exceptions, and finally for cleanup.

Can you give me an example of how to use them together?

Sure! Here's a simple example:

try:
    result = 10 / 0  # This will raise a ZeroDivisionError
except ZeroDivisionError:
    print('You cannot divide by zero!')
finally:
    print('This will always execute.')

What happens if I don't use finally?

If you don't use finally, any cleanup code you need to run won't execute if an exception occurs. It's useful for closing files or releasing resources.

Are there any performance concerns with using try-except?

Using try-except can have a slight performance overhead, but it's generally negligible. It's more important to handle exceptions properly.