@classmethod
def get_key(cls, key=None, invalidate=False):
    namespace = 'riscore'
    if (not key):
        cache_ns_key(namespace, invalidate)
        return
    else:
        ns_key = cache_ns_key(namespace, invalidate)
        return ('%s:%s' % (ns_key, key))
@classmethod
def get_key(cls, key=None, invalidate=False):
    namespace = 'riscore'
    if (not key):
        cache_ns_key(namespace, invalidate)
        return
    else:
        ns_key = cache_ns_key(namespace, invalidate)
        return ('%s:%s' % (ns_key, key))