[Q]:Generate Unique ID's

[Yan Weng]

"mac address + time " is definetely unique.

"Uwe Schmitt" <uwe.schmitt at procoders.net> wrote in message
news:baotu1$1msok$1 at hades.rz.uni-saarland.de...
> achrist at easystreet.com wrote:
> > I'd like to generate unique identifiers for database items,
> > sort of like the ID's that MS uses for COM.  My purpose is
> > to have unique ID's (across multiple [distributed] installations of
> > a program), so that databases can be combined, copied, carried off,
> > re-acquinted, compared, re-synchronized, etc, with some prayer
> > of not being totally munged.
>
> > Is there anything in the standard Python libs to generate an ID
> > like those that Windows uses, which are guaranteed to be unique
> > over all instances of everything, forever, no exceptions?  How
> > about an easy call to Windows (if I don't care about cross-platform)
> > to have it generate one for me?  As this might happen every time
> > a user presses enter, maybe even several times on some updates,
> > it would be nice if it never took more than (e.g.) 0.1 secs or so.
>
> I use something like:
>
> import md5, time
>
> m = md5.md5()
> m.update("myname%s" % time.time())
> res = m.hexdigest()
> m.update("myname%s" % time.time())
> res += m.hexdigest()
>
> You can use your ip-adress/mac-adress/.... instead of 'myname'.
> The result should be 'very' unique.
>
>
> Greetings, Uwe.
>
>
> --
> Dr. rer. nat. Uwe Schmitt   http://www.procoders.net
> schmitt at procoders.net      "A service to open source is a service to
mankind."