Question about getmtime
in [Python]
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From: Brandon on 19 Feb 2010 11:05 Hi everyone, Does copying or moving a file affect the return value of os.path.getmtime(path)? Thank you, Brandon
From: Krister Svanlund on 19 Feb 2010 11:26 On Fri, Feb 19, 2010 at 5:05 PM, Brandon <btaylordesign(a)gmail.com> wrote: > Hi everyone, > > Does copying or moving a file affect the return value of > os.path.getmtime(path)? > > Thank you, > Brandon Wouldn't it be easier to make a script and see for yourself then to write a mail about it?
From: Brandon on 19 Feb 2010 11:30 On Feb 19, 10:26 am, Krister Svanlund <krister.svanl...(a)gmail.com> wrote: > On Fri, Feb 19, 2010 at 5:05 PM, Brandon <btaylordes...(a)gmail.com> wrote: > > Hi everyone, > > > Does copying or moving a file affect the return value of > > os.path.getmtime(path)? > > > Thank you, > > Brandon > > Wouldn't it be easier to make a script and see for yourself then to > write a mail about it? Gee, thanks for the help. I guess.
From: MRAB on 19 Feb 2010 13:06 Brandon wrote: > Hi everyone, > > Does copying or moving a file affect the return value of > os.path.getmtime(path)? > The modification time of a copied file should be the same as the original. The creation time of a copied file will be the time at which it was copied, so that can result in the paradoxical state of a file having been modified _before_ it was created! :-)
From: Dave Angel on 19 Feb 2010 14:02
Brandon wrote: > On Feb 19, 10:26 am, Krister Svanlund <krister.svanl...(a)gmail.com> > wrote: > >> On Fri, Feb 19, 2010 at 5:05 PM, Brandon <btaylordes...(a)gmail.com> wrote: >> >>> Hi everyone, >>> >>> Does copying or moving a file affect the return value of >>> os.path.getmtime(path)? >>> >>> Thank you, >>> Brandon >>> >> Wouldn't it be easier to make a script and see for yourself then to >> write a mail about it? >> > > Gee, thanks for the help. I guess. > > Well, copying the file won't affect the getmtime, since it's still there, and unmodified. Moving it will cause the getmtime to to get an os.error, because the file no longer exists. Probably you mean you're adjusting the path variable to point to the new location for the file. But the answer is still "it depends." How about if you get more specific? If you write a copy utility using two opens, a read() and a write(), then the new file will certainly get a new timestamp unless you do something to prevent it. If you copy the file from a DOS box in Windows XP, using the COPY command, then the getmtime on the new file will be identical to the one on the old. If you do it on an Amiga using pip, I have no idea. Perhaps you're writing a copy/move utility of your own, and you want to know how to cause a new file to have the same attributes as the original. If so, be more specific. DaveA |