python：同步等待异步调用的回调结果

Question

我必须对异步 API 进行一系列调用，它通过回调返回结果。 并且这些调用是连续的，下一个调用必须等到上一个调用完成。

我有这样的事情：

def main():

  value1 = None
  isFinished = False

  def _callback1(returned_value):
    nonlocal value1
    nonlocal isFinished 
    value1 = returned_value
    isFinished = True
  
  call_api_function_1(_callback1)
  
  timeout = 0
  while not isFinished or timeout < 10:
    sleep(1)
    timeout += 1
  
   # move on to next api call, repeating steps above

  value2 = None
  isFinished = False

  def _callback2(returned_value):
    nonlocal value2
    nonlocal isFinished 
    value2 = returned_value
    isFinished = True
  
  call_api_function_2(_callback2)
  
  timeout = 0
  while not isFinished or timeout < 10:
    sleep(1)
    timeout += 1

这看起来真的很丑，我该如何改进？我可能只重用一次 _callback 函数，还有什么？