It's not that fancy, but yes I am on windows. It's a script being called by Cruise Control .NET. They pass in a time stamp on the command line, "YYYYMMDD HH:MM:SS" and I need to advance it by 5 minutes before writing it back out to STDOUT to fake a source control modification.
The process stopped working because it was always returning a time stamp -1 hr due to daylight saving. Changing utcfromtimestamp() to fromtimestamp() seems to have fixed it. On 30 Mar, 13:56, Dave Angel <da...@dejaviewphoto.com> wrote: > There isn't any right answer. There are two very different ways you can > interpret daylight savings time on a time conversion. I suspect you're > on Windows, trying to look at an old file's datestamp, and expect it to > look like Windows displays it. But Windows isn't even consistent with > itself, doing something different on a FAT system than on NTFS. > > For most of my own purposes, I've decided to only store the UTC times > for things. Local time is useful only for interactive display. And > that interactive display is calculated according to some context. > > To illustrate the problem, suppose you were in Chicago last month, and > modified a file at 2:00 pm, CST. And now you are located in PDT time > zone, and want to know when the file was last modified. Should you > convert the time zone and daylight savings, or should you convert only > time zone, or should you display the time as it was known to you at the > original change? > > And to make it more complex, suppose the disk drive involved was located > in France. Just what time is correct? > > Anything other than UTC is subject to confusion. > > CinnamonDonkey wrote: > > Hi All, > > > I had the following bit of code which was working fine until we went > > into Daylight saving this weekend, now the result is an hour out. > > > timeString = "20090330 15:45:23" > > > timeFormat = '%Y-%m-%d %H:%M:%S' > > > modificationTime = datetime.datetime.utcfromtimestamp( time.mktime > > ( time.strptime( timeString, timeFormat ) ) ) > > minutesToAdvance = datetime.timedelta( minutes=5 ) > > > modificationTime = modificationTime + minutesToAdvance > > > datetimeString = str ( modificationTime ).replace( ' ', 'T' ) > > > The expected result should be: > > > datetimeString = "20090330T15:50:23" > > > But instead I get: > > > datetimeString = "20090330T14:50:23" > > > I believe it is going wrong at either the mktime() or utcfromtimestamp > > () stage. > > > What is the correct way to fix this compensating for daylight saving > > automatically? > > > Regards, > > SHaun >8) > > -- http://mail.python.org/mailman/listinfo/python-list
