code: def __init__(self, clientId, key, secret):
      self.__clientId = clientId
      self.__key = key
      self.__secret = secret
      self.__nonce = NonceGenerator()
      self.__lock = threading.Lock()
  
imports: import time
  import datetime
  import hmac
  import hashlib
  import requests
  import threading
  from pyalgotrade.utils import dt
  from pyalgotrade.bitstamp import common
  import logging
label_desc: Use image node_id 1 to create a new HTTPClient object from inherited base classes: object with example: obj = HTTPClient(clientId, key, secret)