How do I raise an exception in Python?

How do I raise an exception in Python?

You can raise an exception in Python using the raise statement followed by the exception type. For example, raise ValueError('Invalid value').

Can I create my own exception type?

Yes, you can create your own exception by subclassing the built-in Exception class. For example:

class MyCustomError(Exception):
    pass

What happens if I don't handle an exception?

If you don't handle an exception, it will propagate up the call stack and may cause your program to terminate with an error message.

How can I catch exceptions in Python?

You can catch exceptions using a try and except block. For example:

try:
    # code that may raise an exception
except ValueError:
    # handle the exception