Python：并行运行子进程

所有子进程并行运行。（为避免这种情况，必须明确等待其完成。）它们甚至可以同时写入日志文件，从而使输出无效。为避免这种情况，您应该让每个进程写入不同的日志文件，并在所有进程完成后收集所有输出。

q = Queue.Queue()result = {}  # used to store the resultsfor fileName in fileNames:  q.put(fileName)def worker():  while True:    fileName = q.get()    if fileName is None:  # EOF?      return    subprocess_stuff_using(fileName)    wait_for_finishing_subprocess()    checksum = collect_md5_result_for(fileName)    result[fileName] = checksum  # store itthreads = [ threading.Thread(target=worker) for _i in range(20) ]for thread in threads:  thread.start()  q.put(None)  # one EOF marker for each thread

之后，结果应存储在中

result