DaveA, Yep, that seems to just be about it! Much easier!
Thanks for the hint! Much appreciated!!!! :) Ron On Thursday, June 6, 2013 5:43:11 PM UTC-7, Dave Angel wrote: > On 06/06/2013 08:03 PM, cerr wrote: > > > Hi, > > > > > > I have a process that I can trigger only at a certain time. Assume I have a > > TDM period of 10min, that means, I can only fire my trigger at the 5th > > minute of every 10min cycle i.e. at XX:05, XX:15, XX:25... For hat I came > > up with following algorithm which oly leaves the waiting while loop if > > minute % TDM/2 is 0 but not if minute % TDM is 0: > > > min = datetime.datetime.now().timetuple().tm_hour*60 + > > datetime.datetime.now().timetuple().tm_min > > > while not (min%tdm_timeslot != 0 ^ min%(int(tdm_timeslot/2)) != 0): > > > > You might have spent three minutes and simplified this for us. And in > > the process discovered the problem. > > > > (BTW, min() is a builtin function, so it's not really a good idea to be > > shadowing it.) > > > > You didn't give python version, so my sample is assuming Python 2.7 > > For your code it shouldn't matter. > > > > tdm = 10 > > tdm2 = 5 > > > > y = min(3,4) > > print y > > > > for now in range(10,32): > > print now, now%tdm, now%tdm2, > > print not(now % tdm !=0 ^ now%tdm2 !=0) #bad > > print not((now % tdm !=0) ^ (now%tdm2 !=0)) #good > > > > > > Your problem is one of operator precedence. Notice that ^ has a higher > > precedence than != operator, so you need the parentheses I added in the > > following line. > > > > What I don't understand is why you used this convoluted approach. Why not > > > > print now%tdm != tdm2 > > > > For precedence rules, see: > > http://docs.python.org/2/reference/expressions.html#operator-precedence > > > > > > > > > > -- > > DaveA -- http://mail.python.org/mailman/listinfo/python-list
