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# Flask View Function API View functions can attach special attributes to control routing behavior. These attributes usually don't need to be set manually, but are very useful in certain advanced scenarios. * * * ## View Function Attributes | Attribute | Type | Default | Description | | --- | --- | --- | --- | | __name__ | str | Function name | Used as the endpoint name. In blueprints, the blueprint name prefix is automatically added | | methods | list | None | HTTP methods accepted by the view function. If not specified in add_url_rule, this value is used | | required_methods | set | None | HTTP methods that must be added. Even if add_url_rule explicitly specifies methods, these methods will be forcibly added | | provide_automatic_options | bool | None | Whether to automatically handle OPTIONS requests. Set to False to customize the OPTIONS response | * * * ## Use Cases | Scenario | Attribute Used | Description | | --- | --- | --- | | Custom OPTIONS response | provide_automatic_options=False | Prevents Flask from automatically generating OPTIONS, letting the view function handle it itself | | Setting methods in decorators | methods | Decorators can pre-set the view function's method list | | Forcing additional methods | required_methods | Ensures certain methods are always added to the URL rule, even if explicitly specified otherwise |