need help about time.sleep, timer

[Sinan Nalkaya]

hello,
i need a function like that,
wait 5 seconds:
(during wait) do the function
but function waits for keyboard input so if you dont enter any it waits
forever.
i tried time.sleep() but when i used time.sleep in while, the function
in while never executed.
then i found something about Timer but couldnt realize any algorithm in
my mind.
i`ll use the function like remote controller. as you know in remote
controllers, tv waits you for second number input. if you dont press
any, executes the first number that you have entered.
thanks.

[Peter Hansen]

Re: need help about time.sleep, timer

Sinan Nalkaya wrote:[color=blue]
> i need a function like that,
> wait 5 seconds:
> (during wait) do the function
> but function waits for keyboard input so if you dont enter any it waits
> forever.[/color]

It's quite unclear whether the last part, above, is one of your
*requirements*, or a description of a problem you are having with your
current approach. Do you *want* it to wait forever if you don't enter
anthing?

-Peter

[Peter Hansen]

Re: need help about time.sleep, timer

Sinan Nalkaya wrote:[color=blue]
> i need a function like that,
> wait 5 seconds:
> (during wait) do the function
> but function waits for keyboard input so if you dont enter any it waits
> forever.[/color]

It's quite unclear whether the last part, above, is one of your
*requirements*, or a description of a problem you are having with your
current approach. Do you *want* it to wait forever if you don't enter
anthing?

-Peter

[Sinan Nalkaya]

Re: need help about time.sleep, timer

Dennis Lee Bieber wrote:
[color=blue]
>On Fri, 18 Nov 2005 22:45:37 -0500, Peter Hansen <peter@engcorp. com>
>declaimed the following in comp.lang.pytho n:
>
>
>[color=green]
>>It's quite unclear whether the last part, above, is one of your
>>*requirements *, or a description of a problem you are having with your
>>current approach. Do you *want* it to wait forever if you don't enter
>>anthing?
>>
>>
>>[/color]
> As I understand it, he (?) wants to accumulate characters to be
>passed to a certain function -- but the function is not to be invoked
>until after a time period has expired; the time period resetting on each
>character entered.
>
> Something I'd do with threads, queues, and sleep...
>
>PSEUDOCODE
>
>thread1:
> while not Shutdown:
> ch = getChar()
> q.put(ch)
>
>
>thread2: #or main
> while not Shutdown:
> chars = []
> while True:
> sleep(max_inter val)
> if q.empty(): break #no input since start of sleep
> while not q.empty(): #collect all input from sleep
> chars.append(q. get())
> inp = "".join(cha rs)
> function(inp)
>
>
>
>
>[/color]
i appreciate your comments and ideas. Dennis told exactly what i tried
to say :), code seems to be fine but during sleep action i think the
above code does not execute

if q.empty(): break #no input since start of sleep
while not q.empty():
chars.append(q. get())

i need something, while sleeping, executes the function that waits for
input from keyboard.
i imagined something like that, i have a queu, it both stores the keys
that pressed and pressing times of these keys, then i`ll proccess these
times. here is scenario
input : 5
after 10 seconds later input 5 is being proccessed
return back to main function
input : 1
after 5 seconds , other input 5
after 5 more seconds , 15 is being proccessed
Thanks.

[Sinan Nalkaya]

Re: need help about time.sleep, timer

Dennis Lee Bieber wrote:
[color=blue]
>On Fri, 18 Nov 2005 22:45:37 -0500, Peter Hansen <peter@engcorp. com>
>declaimed the following in comp.lang.pytho n:
>
>
>[color=green]
>>It's quite unclear whether the last part, above, is one of your
>>*requirements *, or a description of a problem you are having with your
>>current approach. Do you *want* it to wait forever if you don't enter
>>anthing?
>>
>>
>>[/color]
> As I understand it, he (?) wants to accumulate characters to be
>passed to a certain function -- but the function is not to be invoked
>until after a time period has expired; the time period resetting on each
>character entered.
>
> Something I'd do with threads, queues, and sleep...
>
>PSEUDOCODE
>
>thread1:
> while not Shutdown:
> ch = getChar()
> q.put(ch)
>
>
>thread2: #or main
> while not Shutdown:
> chars = []
> while True:
> sleep(max_inter val)
> if q.empty(): break #no input since start of sleep
> while not q.empty(): #collect all input from sleep
> chars.append(q. get())
> inp = "".join(cha rs)
> function(inp)
>
>
>
>
>[/color]
i appreciate your comments and ideas. Dennis told exactly what i tried
to say :), code seems to be fine but during sleep action i think the
above code does not execute

if q.empty(): break #no input since start of sleep
while not q.empty():
chars.append(q. get())

i need something, while sleeping, executes the function that waits for
input from keyboard.
i imagined something like that, i have a queu, it both stores the keys
that pressed and pressing times of these keys, then i`ll proccess these
times. here is scenario
input : 5
after 10 seconds later input 5 is being proccessed
return back to main function
input : 1
after 5 seconds , other input 5
after 5 more seconds , 15 is being proccessed
Thanks.

[Sinan Nalkaya]

Re: need help about time.sleep, timer

Bengt Richter wrote:
[color=blue]
>On Mon, 21 Nov 2005 10:35:20 +0200, Sinan Nalkaya <erchamion.bere n@gmail.com> wrote:
>
>
>[color=green]
>>Dennis Lee Bieber wrote:
>>
>>
>>[color=darkred]
>>>On Fri, 18 Nov 2005 22:45:37 -0500, Peter Hansen <peter@engcorp. com>
>>>declaimed the following in comp.lang.pytho n:
>>>
>>>
>>>
>>>
>>>
>>>>It's quite unclear whether the last part, above, is one of your
>>>>*requiremen ts*, or a description of a problem you are having with your
>>>>current approach. Do you *want* it to wait forever if you don't enter
>>>>anthing?
>>>>
>>>>
>>>>
>>>>
>>>>
>>> As I understand it, he (?) wants to accumulate characters to be
>>>passed to a certain function -- but the function is not to be invoked
>>>until after a time period has expired; the time period resetting on each
>>>character entered.
>>>
>>> Something I'd do with threads, queues, and sleep...
>>>
>>>PSEUDOCODE
>>>
>>>thread1:
>>> while not Shutdown:
>>> ch = getChar()
>>> q.put(ch)
>>>
>>>
>>>thread2: #or main
>>> while not Shutdown:
>>> chars = []
>>> while True:
>>> sleep(max_inter val)
>>> if q.empty(): break #no input since start of sleep
>>> while not q.empty(): #collect all input from sleep
>>> chars.append(q. get())
>>> inp = "".join(cha rs)
>>> function(inp)
>>>
>>>
>>>
>>>
>>>
>>>
>>>[/color]
>>i appreciate your comments and ideas. Dennis told exactly what i tried
>>to say :), code seems to be fine but during sleep action i think the
>>above code does not execute
>>
>>if q.empty(): break #no input since start of sleep
>> while not q.empty():
>> chars.append(q. get())
>>
>>i need something, while sleeping, executes the function that waits for
>>input from keyboard.
>>i imagined something like that, i have a queu, it both stores the keys
>>that pressed and pressing times of these keys, then i`ll proccess these
>>times. here is scenario
>>input : 5
>>after 10 seconds later input 5 is being proccessed
>>return back to main function
>>input : 1
>>after 5 seconds , other input 5
>>after 5 more seconds , 15 is being proccessed
>>Thanks.
>>
>>[/color]
>
>If I understand, you really don't want to sleep, you want to wait a max time of 5 seconds
>for a character. You can get that from a queue.get(True, 5) hence, you could try the
>following as a start (untested, and I don't have much experience with python threading,
>so will wait for bug reports ;-)
>
>Note that it uses getch for input, which doesn't echo. (Change to getche if you want echo)
>You can run this from the command line with one arg: the number of seconds you want to
>have the test continue. At the end of that time it will set the Shutdown event, and
>thread2 should empty the queue and wait 5 seconds and then do its last function call and
>see the shutdown event.
>
>----< tqinp.py >-----------------------------------------------------------------------
># tqinp.py -- test queued input of unechoed character input until a 5-second delay
>import threading
>import Queue
>import msvcrt
>queue = Queue.Queue(10) # 2 is prob enough for this thing
>Shutdown = threading.Event ()
>
>def getChar(): return msvcrt.getch() # blocks
>def function(s): print 'function(%r)'% s
>
>def thread1(q):
> while not Shutdown.isSet( ):
> ch = getChar()
> q.put(ch)
>
>def thread2(q): #or main
> while not Shutdown.isSet( ):
> chars = ''
> try:
> while True: chars += q.get(True, 5)
> except Queue.Empty, e:
> print 'No input for 5 seconds. Using %r'%chars
> function(chars)
>
>import time
>def test(trial_time ):
> thr1 = threading.Threa d(target=thread 1, args=(queue,))
> thr1.start()
> thr2 = threading.Threa d(target=thread 2, args=(queue,))
> thr2.start()
> t0 = time.clock()
> time.sleep(tria l_time)
> print 'Ending trial after %s seconds' % (time.clock()-t0)
> Shutdown.set()
>
>if __name__ == '__main__':
> import sys
> if not sys.argv[1:]: raise SystemExit,'Usa ge: python tqinp.py'
> test(float(sys. argv[1]))
>---------------------------------------------------------------------------------------
>
>Ok, in the following I'll type 123 <pause 5> abc <pause to let it die>
>
>[ 5:40] C:\pywk\clp\thr eadstuff>py24 tqinp.py 15
>No input for 5 seconds. Using '123'
>function('123' )
>No input for 5 seconds. Using 'abc'
>function('abc' )
>Ending trial after 14.9948775627 seconds
>No input for 5 seconds. Using ''
>function('')
>
>[ 5:41] C:\pywk\clp\thr eadstuff>
>
>Except it didn't die until I hit another key to let thread1 loop and see its Shutdown test.
>But this is alpha 0.01, so you can fix that various ways. Or maybe get the real requirements down ;-)
>HTH
>(once I get it posted -- news reads ok now but news server is not accepting posts.
>I suspect they do system-hogging chores Sun night wee hours ;-/
>
>Regards,
>Bengt Richter
>
>[/color]
thanks for all replies especially via with code ones ;) steve`s codes
works perfectly except time part (ill look investigate it), i had to do
little edit because i`m unix user and dont have msvcrt but no problem.
also i am noticed that, i have to study on threading much as you said.
thanks again.