code: def renamenx(self, src, dst):
          "Rename key ``src`` to ``dst`` if ``dst`` doesn't already exist"
          with self.pipe as pipe:
              return pipe.renamenx(self.redis_key(src), self.redis_key(dst)f renamenx(self, src, dst):
          "Rename key ``src`` to ``dst`` if ``dst`` doesn't already exist"
          with self.pipe as pipe:
              return pipe.renamenx(self.redis_key(src), self.redis_key(dst))
docs: Rename key ``src`` to ``dst`` if ``dst`` doesn't already exist