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Update exceptions.md (#9071)

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docs/api-guide/exceptions.md
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@ -101,7 +101,7 @@ Note that the exception handler will only be called for responses generated by r
The **base class** for all exceptions raised inside an `APIView` class or `@api_view`. The **base class** for all exceptions raised inside an `APIView` class or `@api_view`.
To provide a custom exception, subclass `APIException` and set the `.status_code`, `.default_detail`, and `default_code` attributes on the class. To provide a custom exception, subclass `APIException` and set the `.status_code`, `.default_detail`, and `.default_code` attributes on the class.
For example, if your API relies on a third party service that may sometimes be unreachable, you might want to implement an exception for the "503 Service Unavailable" HTTP response code. You could do this like so: For example, if your API relies on a third party service that may sometimes be unreachable, you might want to implement an exception for the "503 Service Unavailable" HTTP response code. You could do this like so: