code: def ip_bracket(addr):
      '''
      Convert IP address representation to ZMQ (URL) format. ZMQ expects
      brackets around IPv6 literals, since they are used in URLs.
      '''
      addr = ipaddress.ip_address(addr)
      return ('[{}]' if addr.version == 6 else '{}').format(addrf ip_bracket(addr):
      '''
      Convert IP address representation to ZMQ (URL) format. ZMQ expects
      brackets around IPv6 literals, since they are used in URLs.
      '''
      addr = ipaddress.ip_address(addr)
      return ('[{}]' if addr.version == 6 else '{}').format(addr)
docs: Convert IP address representation to ZMQ (URL) format. ZMQ expects
      brackets around IPv6 literals, since they are used in URLs.