Function assert_context

dash/_callback_context.py:22–27

(*args, **kwargs)

def has_context(func):
    @functools.wraps(func)
    def assert_context(*args, **kwargs):
        if not context_value.get():
            raise exceptions.MissingCallbackContextException(
                f"dash.callback_context.{getattr(func, '__name__')} is only available from a callback!"
            )
        return func(*args, **kwargs)

    return assert_context