想用python写个简单时钟

ajinn

python输出当前时间比较简单，
我想每隔1秒刷新下时钟，不知道python下有什么简单的方法。

3227049

import time,sys
while True:
     s=time.ctime()
     length=len(s)
     sys.stdout.write(s)
     time.sleep(1)
     sys.stdout.write('\b'*length)

baif

原帖由 ajinn 于 2008-5-31 10:43 发表
python输出当前时间比较简单，
我想每隔1秒刷新下时钟，不知道python下有什么简单的方法。

Programming Python, 3rd Edition
  By Mark Lutz

1. 
   
2. ##########################################################################
   
3. # set and catch alarm timeout signals in Python; time.sleep doesn't play
   
4. # well with alarm (or signal in general in my Linux PC), so we call
   
5. # signal.pause here to do nothing until a signal is received;
   
6. ##########################################################################
   
7. 
   
8. import sys, signal, time
   
9. def now(): return time.ctime(time.time( ))
   
10. 
    
11. def onSignal(signum, stackframe):                 # python signal handler
    
12.     print 'Got alarm', signum, 'at', now( )       # most handlers stay in effect
    
13. 
    
14. while 1:
    
15.     print 'Setting at', now( )
    
16.     signal.signal(signal.SIGALRM, onSignal)       # install signal handler
    
17.     signal.alarm(5)                               # do signal in 5 seconds
    
18.     signal.pause( )                               # wait for signals
    

复制代码

[ 本帖最后由 baif 于 2008-5-31 14:50 编辑 ]

cdkey51

强人啊！！！！受教了

shengsiqn

呼呼~~很不错~~顶起~~~~~

baif

MainPage of signal(2)

SIGNAL(2)                  Linux Programmer’s Manual                 SIGNAL(2)
...
...
DESCRIPTION
       The  behavior of signal() varies across Unix versions, and has also varied historically across different versions of Linux.  Avoid its use: use sigaction(2) instead.  See Portability
       below.
...

Release Notes of Python 2.0

A wrapper API was added for signal() and sigaction(). Instead of either function, always use PyOS_getsig() to get a signal handler and PyOS_setsig() to set one. A new convenience typedef PyOS_sighandler_t is defined for the type of signal handlers.

Documentation of Python API 5.1 Operating System...

PyOS_sighandler_t   PyOS_setsig  ( int i, PyOS_sighandler_t h)
Set the signal handler for signal i to be h; return the old signal handler. This is a thin wrapper around either sigaction() or signal(). Do not call those functions directly! PyOS_sighandler_t is a typedef alias for void (*)(int).

原帖由 baif 于 2008-5-31 14:46 发表


Programming Python, 3rd Edition
  By Mark Lutz


##########################################################################
# set and catch alarm timeout signals in Python; time.sleep do ...

refeihc

3楼：

你贴的代码运行起来有问题，是这一句：
signal.signal(signal.SIGALRM, onSignal)

提示是：
AttributeError:'Module' object has no attribute 'SIGALRM'

我是在Python 2.6的command line中运行的。
用dir(signal)也看不到上面的属性，不知是什么原因？

xiaoyu9805119

原帖由 refeihc 于 2009-5-21 11:23 发表
3楼：

你贴的代码运行起来有问题，是这一句：
signal.signal(signal.SIGALRM, onSignal)

提示是：
AttributeError:'Module' object has no attribute 'SIGALRM'

我是在Python 2.6的command line中运 ...

windows把？

nietsche

如果是GUI编程，自己弄个钟表界面，然后自己定义时钟就ok了。
  timer = wx.PyTimer(self.Notify())
   timer.Start(1000) #1second
   self.Notify()
   
   def Notify()
   //code here