class_docstr: Cuckoo Filter commands.
class_docstr_tok: ["Cuckoo","Filter","commands","."]
docstr: Add an `item` to a Cuckoo Filter `key` only if item does not yet exist.
  Command might be slower that `add`.
  For more information see `CF.ADDNX <https://redis.io/commands/cf.addnx>`_.
docstr_tok: ["Add","an","`","item","`","to","a","Cuckoo","Filter","`","key","`","only","if","item","does","not","yet","exist",".","Command","might","be","slower","that","`","add","`",".","For","more","information","see","`","CF.ADDNX","<","https",":","\/\/redis.io\/commands\/cf.addnx",">","`","_","."]
code: def addnx(self, key, item):
      """
      Add an `item` to a Cuckoo Filter `key` only if item does not yet exist.
      Command might be slower that `add`.
      For more information see `CF.ADDNX <https://redis.io/commands/cf.addnx>`_.
      """  # noqa
      return self.execute_command(CF_ADDNX, key, item)
  
imports: from redis.client import NEVER_DECODE
  from redis.exceptions import ModuleError
  from redis.utils import HIREDIS_AVAILABLE, deprecated_function
label_desc: Use image node_id 3 for calling the CFCommands obj's underlying member method code with example usage: obj.addnx(key, item) and returns: self