Yes. I used a file, thanks.
On Sat, Apr 11, 2009 at 09:30:40AM -0400, Dave Angel wrote: > > > Daniel Dalton wrote: >> Hi! >> >> I'm writing a program to provide me with battery warnings when my >> battery hits certain levels. It just checks the current level and does >> something. I plan to call it from a a cron job. But If the cron runs >> every minute, warnings every minute would be rather annoying. so is >> there a way to make the script check if it has already ran before? >> eg. can I write to a variable on one run of the program, and on the next >> read that value that was written? >> >> Thx! >> >> Daniel. >> >> > To put it simply, you want to store a value from one run of the script, > that persists till the next run of the same script. > > The most portable way to to that is to write a file. And since all you > care about is the time of writing, the file can be zero length. So > simply check for the file, determine it's creation time, and decide if > it's too recent to want to run again. If the file doesn't exist, or is > "old", then write the file and notify the user. > > > It's still messy to leave this bogus file around, so think carefully > about where to put it. If the source directory is writable, it's > reasonble to me to simply put it there. That way, if the program gets > deleted, it'll probably get deleted at the same time. Failing that, you > could put it in a TEMP directory. And perhaps the sneakiest place to > put it, if you're on Windows, is in the "run once on startup" directory. > Make it a do-nothing batch file, and Windows will remove it next time the > user restarts the system. > > > -- > http://mail.python.org/mailman/listinfo/python-list
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