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All operations on the proxy are forwarded to the bound object. If no object is bound, a ``RuntimeError`` is raised. :param local: The context-local object that provides the proxied object. :param name: Proxy this attribute from the proxied object. :param unbound_message: The error message to show if the context-local object is unbound. Proxy a :class:`~contextvars.ContextVar` to make it easier to access. Pass a name to proxy that attribute. .. code-block:: python _request_var = ContextVar("request") request = LocalProxy(_request_var) session = LocalProxy(_request_var, "session") Proxy an attribute on a :class:`Local` namespace by calling the local with the attribute name: .. code-block:: python data = Local() user = data("user") Proxy the top item on a :class:`LocalStack` by calling the local. Pass a name to proxy that attribute. .. code-block:: app_stack = LocalStack() current_app = app_stack() g = app_stack("g") Pass a function to proxy the return value from that function. 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