class_docstr: Implementation of ZAP authentication for zmq connections.
  
  Note:
  
  - libzmq provides four levels of security: default NULL (which the Authenticator does
    not see), and authenticated NULL, PLAIN, CURVE, and GSSAPI, which the Authenticator can see.
  - until you add policies, all incoming NULL connections are allowed.
    (classic ZeroMQ behavior), and all PLAIN and CURVE connections are denied.
  - GSSAPI requires no configuration.
docstr: Deny (blacklist) IP address(es).
  
  Addresses not in the blacklist will be allowed to continue with authentication.
  
  Blacklist is mutually exclusive with whitelist.
docstr_tok: ["Deny","(","blacklist",")","IP","address","(","es",")",".","Addresses","not","in","the","blacklist","will","be","allowed","to","continue","with","authentication",".","Blacklist","is","mutually","exclusive","with","whitelist","."]
code: def deny(self, *addresses):
      """Deny (blacklist) IP address(es).
  
      Addresses not in the blacklist will be allowed to continue with authentication.
  
      Blacklist is mutually exclusive with whitelist.
      """
      if self.whitelist:
          raise ValueError(
              "Only use a whitelist or a blacklist, not both"
          )
      self.log.debug("Denying %s", ",".join(addresses))
      self.blacklist.update(addresses)
  
imports: import logging
  import zmq
  from zmq.utils import z85
  from zmq.utils.strtypes import bytes, unicode, b, u
  from zmq.error import _check_version
  from .certs import load_certificates
label_desc: Use image node_id 5 for calling the Authenticator obj's underlying member method code with example usage: obj.deny() without return types