-----Ursprungligt meddelande-----
From: Dave Angel
Sent: Tuesday, November 29, 2011 4:33 PM
To: bod...@googlemail.com
Cc: Mic ; Tutor - python List
Subject: Re: [Tutor] Making a function run every second.
(You put your response in the wrong place; it belongs after the part
you're quoting.)
Okay, thanks.
On 11/29/2011 10:19 AM, bod...@googlemail.com wrote:
You won't get it exactly on because the time it takes to call the
function will affect your trigger time.
I would use something like an infinite loop with a 1 second sleep after
the function call
Bodsda
Sent from my BlackBerry® wireless device
-----Original Message-----
From: "Mic"<o0m...@hotmail.se>
Sender: tutor-bounces+bodsda=googlemail....@python.org
Date: Tue, 29 Nov 2011 15:54:59
To:<tutor@python.org>
Subject: [Tutor] Making a function run every second.
Hi
I want a function to run every second , how do I do that?
Say that the function look like this:
def hi():
print("hi")
Without a clearer spec, there are too many possible answers. As Bobsda
says, you can't get it exactly one second apart. But you also have the
problem of whether a drift is okay. For example, if you have a global
you're incrementing each time that function runs, and you want it to
represent the total time the program has been running, then a simple
sleep() is totally wrong.
Okay, I undestand. Hmm, what is a drift?
What I was concerned about is that perhaps this is for one of the tkinter
programs Mic is writing. For an event-driven program, sleep() calls of
even a second are unaccepable. And if you literally write a while loop
like that, your whole program would stop responding.
Yes, this is one of my tkinter programs :) Why would the program stop
responding using a sleep()?
So Mik:
Tell us more about the real requirements. Is drift acceptable, is this a
console program or some gui environment, are there any other hidden
assumptions?
Okay, this function approximately runs every second and check what the time
is.
(Well, every 30 second or every minute would be okay if that makes it
easier)
If the time is 15:00 it is supposed to remove a file. That should be all
requirements!
I have figured out how to make the function check what time it is and how to
remove the file when the time is 15:00, but I don't know how to make it run
every
second or something like that.
Thanks!
Mic
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