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But the other issue is what happens if we have an issue after the file is already open. We need to make sure we close the file. We could put that in the finally section at the very bottom. But that will throw an exception if the original file never successfully opened. The result is this big mess of nested try/except statements to hopefully. In addition to using an except block after the try block, you can also use the finally block. The code in the finally block will be executed regardless of whether an exception occurs. Raising an Exception You can raise an exception in your own program by using the raise exception , value statement. Raising an exception breaks current code execution and returns the exception back until it is handled. Example A try block look like below.
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