Run once while loop

[Ian Kelly]

On Tue, Apr 3, 2012 at 3:00 PM, Anatoli Hristov <tolidtm at gmail.com> wrote:
> On 03 Apr 2012, at 22:45, Ian Kelly <ian.g.kelly at gmail.com> wrote:
>
>> On Tue, Apr 3, 2012 at 2:36 PM, Anatoli Hristov <tolidtm at gmail.com> wrote:
>>> Hi,
>>>
>>> I'm trying to do a while loop with condition of time if time is
>>> 12:00:00 print text, but for this one second the text is printed at
>>> least 50 times, how can I print only once?
>>
>> Set a flag when you print the text to indicate that you've already
>> printed it, and don't print it again if the flag is set.  When it's no
>> longer 12:00:00, reset the flag.
>>
>> That said, a busy while loop is probably the wrong way to do this,
>> because it will run your CPU at 100%.  Better would be to put the
>> thread to sleep with time.sleep() calls or a real event loop with a
>> timer event.
>>
>> Cheers,
>> Ian
>
> Thank you Ian,
>
> what if I wait for other conditions if I use time.sleep for 1 sec? it
> means that all the program is sleeping for a sec.

You can sleep for less than a second.  0.2 seconds or so allows a
pretty nice response time while still limiting how much your script
will spin the CPU.