async def renamenx(self, src, dst):
        """
        Rename key ``src`` to ``dst`` if ``dst`` doesn't already exist

        Cluster impl:
            Check if dst key do not exists, then calls rename().

            Operation is no longer atomic.
        """
        if not await self.exists(dst):
            return await self.rename(src, dst)

        return False
async def renamenx ( self , src , dst ) : if not await self . exists ( dst ) : return await self . rename ( src , dst ) return False
Rename key ``src`` to ``dst`` if ``dst`` doesn't already exist

        Cluster impl:
            Check if dst key do not exists, then calls rename().

            Operation is no longer atomic.