Dispatches a hook dictionary on a given piece of data.

def dispatch_hook(key, hooks, hook_data):
    """Dispatches a hook dictionary on a given piece of data."""

    hooks = hooks or dict()

    if key in hooks:
        try:
            return hooks.get(key).__call__(hook_data) or hook_data

        except Exception, why:
            warnings.warn(str(why))

    return hook_data