The try block lets you test a block of code for errors. The except block lets you handle the error. The finally block lets you execute code, regardless of the result of the try- and except blocks.
When an error occurs, or exception as we call it, Python will normally stop and generate an error message. These exceptions can be handled using the try statement:
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You can define as many exception blocks as you want, e.g. if you want to execute a special block of code for a special kind of error. So, print one message if the try block raises a NameError and another for other errors :
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The finally block, if specified, will be executed regardless if the try block raises an error or not.
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