关于python：命令行多线程

Command line multithreading

我正在编写一个简单的命令行程序，显示当前时间并让用户设置警报。但是，当raw_input阻止它时，警报没有响起。我甚至实现了多线程，但它没有工作。这是完整的代码：

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import datetime, time, thread, os

program_running = True
now = datetime.datetime.now()
alarm_status = 0
alarm_hour = 0
alarm_minute = 0

def clock():
now = datetime.datetime.now()
print now.strftime('%H:%M')

def set_alarm():
global alarm_hour, alarm_minute, alarm_status

alarm_time = raw_input('Set Alarm (XX:XX) : ')
alarm_hour = alarm_time[:alarm_time.find(':')]
alarm_minute = alarm_time[alarm_time.find(':')+1:]
alarm_status = 1

def alert_thread():
global alarm_hour, alarm_minute, alarm_status
while True:
if(alarm_status):
if (str(now.hour) == str(alarm_hour) and str(now.minute) == str(alarm_minute)):
print 'Ring.. Ring..'
alarm_status = 0

#program start here
thread.start_new_thread(alert_thread,())
while(program_running):
now = datetime.datetime.now()

print '1) Clock'
print '2) Alarm'
print '3) Quit'
choice = input('Choose (1-6) : ')

if(choice==1):
clock()
elif(choice==2):
set_alarm()
elif(choice==3):
program_running = False

相关讨论

我发现使用全局变量的实现只有一个线程用于警报有点奇怪。这样，您始终只能设置一个警报，即使没有设置任何警报，也始终会有警报线程运行。此外，您现在永远不会更新警报根本不应该运行。
也许考虑这样做。这只是一个快速的重构，并不是说这是完美的，但它可以帮助你继续：

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import datetime, time, threading, os

def clock():
now = datetime.datetime.now()
print now.strftime('%H:%M')

def set_alarm():
alarm_time = raw_input('Set Alarm (XX:XX) : ')
alarm_hour = alarm_time[:alarm_time.find(':')]
alarm_minute = alarm_time[alarm_time.find(':')+1:]
alarm_thread = threading.Thread(target=alert_thread, args=(alarm_time, alarm_hour, alarm_minute))
alarm_thread.start()

def alert_thread(alarm_time, alarm_hour, alarm_minute):
print"Ringing at {}:{}".format(alarm_hour, alarm_minute)
while True:
now = datetime.datetime.now()
if str(now.hour) == str(alarm_hour) and str(now.minute) == str(alarm_minute):
print ("Ring.. Ring..")
break

#program start here
while True:
now = datetime.datetime.now()
print '1) Clock'
print '2) Alarm'
print '3) Quit'
choice = input('Choose (1-6) : ')

if(choice==1):
clock()
elif(choice==2):
set_alarm()
elif(choice==3):
break