The `__exit__` method of the `tempfile.NamedTemporaryFile` class in Python is used to handle the cleanup and closing of the temporary file created by the `NamedTemporaryFile` object. This method is automatically called when the object is used as a context manager with a `with` statement. It ensures that the temporary file is closed and removed from the file system after its usage, regardless of any exceptions that might occur within the block of code. This assists in managing temporary files efficiently and safely in Python programs.
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