class_docstr: extends base pathos server to an XML-RPC dispatcher
class_docstr_tok: ["extends","base","pathos","server","to","an","XML-RPC","dispatcher"]
docstr: register a child process so it can be retrieved on select events
docstr_tok: ["register","a","child","process","so","it","can","be","retrieved","on","select","events"]
code: def _registerChild(self, pid, fromchild):
      """register a child process so it can be retrieved on select events"""
  
      self._activeProcesses[fromchild] = pid
      self._selector.notifyOnReadReady(
          fromchild, self._handleMessageFromChild
      )
  
imports: import os
  import socket
  import xmlrpc.client
  from http.server import BaseHTTPRequestHandler
  from xmlrpc.server import SimpleXMLRPCDispatcher
  from pathos.server import Server
  from pathos.util import print_exc_info, spawn2, _str, _b
  from pathos import logger
label_desc: Use image node_id 4 for calling the XMLRPCServer obj's underlying member method code with example usage: obj._registerChild(pid, fromchild) without return types