btw, some literature about python and programming in general would perhaps be in order...
I recommend diveintopython.org On 2/1/07, Honza Kr�l <[EMAIL PROTECTED]> wrote: > On 2/1/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > > > > I like that brevity and simplicity, but could you clarify what's going > > on with this line: > > last_request = request.get( 'last_request', now ) > > get() is method on python dictionaries: > Help on built-in function get: > > get(...) > D.get(k[,d]) -> D[k] if k in D, else d. d defaults to None. > > it returns the value stored under key k, if it cannot find it, it > returns d, so in this case > > # oops, I missed the 'session' last time: > last_request = request.session.get( 'last_request', now ) > > is equivalent to > try: > last_request = request.session['last_request'] > except KeyError: > last_request = now > > > > > > After all I've gone through, and with it appearing to work, I want to > > make sure I understand any changes! > > > > > > > > On Jan 31, 5:49 pm, "Honza Kr�l" <[EMAIL PROTECTED]> wrote: > > > this seems more accurate: > > > > > > def process_request( self, request ): > > > now = datetime.datetime.now() > > > # get last_request, defaults to now, when he was never seen before > > > # you may wish to omit setting last_seen in that case (he > > > wasn't ever seen) > > > last_request = request.get( 'last_request', now ) > > > # when did you last see him? when he last requested something! :: > > > # if you really want to, you can add the 4-hour waiting time > > > here (only for this line though !!) > > > request.session['last_seen'] = last_request > > > # now is the time he is making his last request > > > request.session['last_request'] = now > > > > > > no tries, no catches... > > > > > > On 1/31/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > > > > > > > > > > > > > > > > > > > I think this MAY be working now and I think I even finally wrapped my > > > > head around what's going on. So, in hopes of helping someone else some > > > > day (or, alternately, someone pointing out any trouble spots > > > > remaining), the last_visit middleware: > > > > > > > import datetime > > > > > > > class LastSeen (object): > > > > def process_request(self, request): > > > > now = datetime.datetime.now() > > > > try: > > > > last_request = request.session['last_request'] > > > > # don't update it too often, every 4 hours should be ok > > > > if (now - last_request).seconds > (60 * 60 *4): > > > > request.session['last_seen'] = last_request > > > > request.session['last_request'] = now > > > > except KeyError: > > > > request.session['last_request'] = > > > > datetime.datetime.now() > > > > request.session['last_seen'] = datetime.datetime.now() > > > > except TypeError: > > > > request.session['last_request'] = > > > > datetime.datetime.now() > > > > > > > And I'd like to thank Honza, Doug, and everyone else who tried so hard > > > > to pound this simple thing through my thick skull. > > > > > > > On Jan 31, 8:42 am, "Honza Kr?l" <[EMAIL PROTECTED]> wrote: > > > > > On 1/31/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > > > > > > > > > I know I'm dense, and I'm just not seeing this, but isn't that what > > > > > > I'm doing? > > > > > > > > > now = datetime.datetime.now() > > > > > > last_request = request.session['last_request'] > > > > > > > > > if (now - last_request).seconds > (60 * 60 *4): > > > > > > ... > > > > > > > > but this line: > > > > > > > > > request.session['last_request'] = now > > > > > > > > is only executed when last_request is lder than 4 hours... hardly > > > > > seems like always, does it? > > > > > > > > > On Jan 31, 7:47 am, "Honza Kr?l" <[EMAIL PROTECTED]> wrote: > > > > > > > On 1/31/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > > > > > > > > > > > Ok, but if I update last_request at every request, then won't > > > > > > > > (now - > > > > > > > > last_request) ALWAYS be more or less 0? > > > > > > > > > > not if you update it AFTER the comparison... > > > > > > > > > > > On Jan 31, 4:16 am, "Honza Kr?l" <[EMAIL PROTECTED]> wrote: > > > > > > > > > On 1/31/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > > > > > > > > > > > > > There's some conceptual thing I'm apparently just not > > > > > > > > > > getting. I > > > > > > > > > > attempted to follow Doug's advice and came up with: > > > > > > > > > > > > > class LastSeen (object): > > > > > > > > > > """Middleware that adds various objects to thread local > > > > > > > > > > storage > > > > > > > > > > from the request object.""" > > > > > > > > > > def process_request(self, request): > > > > > > > > > > now = datetime.datetime.now() > > > > > > > > > > try: > > > > > > > > > > last_request = request.session['last_request'] > > > > > > > > > > # don't update it too often, every 4 hours > > > > > > > > > > should be ok > > > > > > > > > > if (now - last_request).seconds > (60 * 60 *4): > > > > > > > > > > request.session['last_seen'] = > > > > > > > > > > last_request > > > > > > > > > > request.session['last_request'] = now > > > > > > > > > > > > you have to update last request at every request, not only > > > > > > > > > when its > > > > > > > > > too old... if you do it like this it is EXACTLY what you did > > > > > > > > > before > > > > > > > > > > > > > except KeyError: > > > > > > > > > > request.session['last_request'] = > > > > > > > > > > datetime.datetime.now() > > > > > > > > > > request.session['last_seen'] = > > > > > > > > > > datetime.datetime.now() > > > > > > > > > > except TypeError: > > > > > > > > > > request.session['last_request'] = > > > > > > > > > > datetime.datetime.now() > > > > > > > > > > request.session['last_seen'] = > > > > > > > > > > datetime.datetime.now() > > > > > > > > > > > > > Which appears to do the exact same thing I was doing before. > > > > > > > > > > > > > On Jan 30, 1:07 pm, "Doug Van Horn" <[EMAIL PROTECTED]> > > > > > > > > > > wrote: > > > > > > > > > > > On Jan 30, 11:23 am, "[EMAIL PROTECTED]" <[EMAIL > > > > > > > > > > > PROTECTED]> > > > > > > > > > > > wrote: > > > > > > > > > > > > > > > Well, if I were doing it by hand, every time they came > > > > > > > > > > > > to the site I > > > > > > > > > > > > would set this_visit, and then set last_visit (or > > > > > > > > > > > > last_seen, or > > > > > > > > > > > > whatever) to the previous value of this_visit, and I > > > > > > > > > > > > would only do it > > > > > > > > > > > > once, when they first come to the site. > > > > > > > > > > > > > > The question, then, is how to determine "when they first > > > > > > > > > > > come to the > > > > > > > > > > > site." > > > > > > > > > > > > > > Right now, you determine that by saying, "If the > > > > > > > > > > > last_seen variable is > > > > > > > > > > > older than 4 hours, then this user was last seen right > > > > > > > > > > > now." Note > > > > > > > > > > > that they may have clicked just a second ago, when the > > > > > > > > > > > last_seen > > > > > > > > > > > variable was 3:59:59 old. Their next click will bump the > > > > > > > > > > > 'last_seen' > > > > > > > > > > > variable. Not what you want. > > > > > > > > > > > > > > You probably want to store the most recent request > > > > > > > > > > > timestamp as part > > > > > > > > > > > of the session. Something like: > > > > > > > > > > > > > > request.session['last_request'] = datetime.now() > > > > > > > > > > > > > > Then, you need to figure out when your 'last_seen' > > > > > > > > > > > session variable > > > > > > > > > > > should be updated. It might be something like: > > > > > > > > > > > > > > if (now - last_request) > (60 * 60 * 4): # if the last > > > > > > > > > > > request is 4+ > > > > > > > > > > > hours old... > > > > > > > > > > > request.session['last_seen'] = last_request > > > > > > > > > > > > > > Handle your base case, where there is no 'last_request' > > > > > > > > > > > (and thus no > > > > > > > > > > > last_seen), and you should be good. > > > > > > > > > > > > > > Hope that helps. > > > > > > > > > > > > > > And remember the advice listed by an earlier post-er. > > > > > > > > > > > Design your > > > > > > > > > > > algorithm on paper. Think it through. Write some psuedo > > > > > > > > > > > code. Run > > > > > > > > > > > some mental 'unit tests'. Then go code it. > > > > > > > > > > > > > > Regards, > > > > > > > > > > > > > > Doug Van Horn, > > > > > > > > > > > Presidenthttp://www.maydigital.com/~~http://www.limapapa.com/ > > > > > > > > > > > > -- > > > > > > > > > Honza Kr?l > > > > > > > > > E-Mail: [EMAIL PROTECTED] > > > > > > > > > ICQ#: 107471613 > > > > > > > > > Phone: +420 606 678585 > > > > > > > > > > -- > > > > > > > Honza Kr?l > > > > > > > E-Mail: [EMAIL PROTECTED] > > > > > > > ICQ#: 107471613 > > > > > > > Phone: +420 606 678585 > > > > > > > > -- > > > > > Honza Kr?l > > > > > E-Mail: [EMAIL PROTECTED] > > > > > ICQ#: 107471613 > > > > > Phone: +420 606 678585 > > > > > > -- > > > Honza Kr?l > > > E-Mail: [EMAIL PROTECTED] > > > ICQ#: 107471613 > > > Phone: +420 606 678585 > > > > > > > > > > > > > -- > Honza Kr�l > E-Mail: [EMAIL PROTECTED] > ICQ#: 107471613 > Phone: +420 606 678585 > -- Honza Kr�l E-Mail: [EMAIL PROTECTED] ICQ#: 107471613 Phone: +420 606 678585 --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Django users" group. 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