python - Multiprocessing with a while loop and different arguments

Question

I'm trying to loop every second between two datetimes and call a function passing in the current datetime value. I want to split the workload so it doesn't take as long. The 'get_reading' function raises a KeyError if it cannot get a reading with the datetime passed. When I run this, it still produces the error. What am I doing wrong?

sdatetime = datetime.datetime(fromYear, fromMonth, fromDay, fromHour, fromMinute, fromSecond)   # start date
edatetime = datetime.datetime(upToYear, upToMonth, upToDay, upToHour, upToMinute, upToSecond)   # end date

procs = []
proc = Process(target=get_reading)  # instantiating without any argument
procs.append(proc)
proc.start()

while sdatetime <= edatetime:
    print ('Doing something at', sdatetime)
    try:
        proc = Process(target=get_reading, args=(sdatetime,))
        procs.append(proc)
        proc.start()
        # complete the processes
        for proc in procs:
            proc.join()
    except KeyError as e:
        #Do nothing
        pass
    sdatetime += timedelta(seconds=1)

Answer 1

等待大神答复