class_docstr: This class manages multiple query packs that are firing off simultaneously
  
  This class is not a service--it is a stateful container for QueryPacks, which themselves
  can be stateful.
class_docstr_tok: ["This","class","manages","multiple","query","packs","that","are","firing","off","simultaneously","This","class","is","not","a","service","--","it","is","a","stateful","container","for","QueryPacks",",","which","themselves","can","be","stateful","."]
docstr: Sets up query packs for this manager.
  
  QueryPacks are a list of queries that this manager is intended to manage.
docstr_tok: ["Sets","up","query","packs","for","this","manager",".","QueryPacks","are","a","list","of","queries","that","this","manager","is","intended","to","manage","."]
code: def initialize_query_packs(self):
      """Sets up query packs for this manager.
  
      QueryPacks are a list of queries that this manager is intended to manage.
      """
  
      self._query_packs = []
  
      for pack_config in self._query_configs:
          query_pack = QueryPack(pack_config, self._execution_context)
          query_pack.load_from_cache()
  
          self._query_packs.append(query_pack)
  
imports: import json
  from logging import Logger
  from streamalert.scheduled_queries.handlers.athena import AthenaClient
  from streamalert.scheduled_queries.query_packs.configuration import QueryPackConfiguration, QueryPackRepository
  from streamalert.scheduled_queries.query_packs.parameters import QueryParameterGenerator
  from streamalert.scheduled_queries.state.state_manager import StateManager
  from streamalert.scheduled_queries.support.clock import Clock
label_desc: Use image node_id 3 for calling the QueryPacksManager obj's underlying member method code with example usage: obj.initialize_query_packs() without return types