On Tuesday, March 28, 2017 at 12:40:33 PM UTC-7, Anthony wrote: > > Maybe use Python sets: > > full_range = set(xrange(100)) > used = set() > used.add(5) > used.add(30) > used.add(65) > unused = full_range - used # A set of the integers 0-99, excluding 5, 30, > and 65 > > Anthony >
Okay, that's pretty concise, and gives me the same result as the more C-like way that my first suggestion represents. /dps > On Tuesday, March 28, 2017 at 2:14:23 PM UTC-4, Dave S wrote: >> >> I use a set in one project that needs to keep track of used "ids", so >> essentially I'm appending integers (from within a specified range) to the >> set. I'd like to find out, when I'm all done appending, which integers >> from the range I DIDN'T add. >> >> What is the efficient and pythonic way of checking this? My first >> thought is to start with an empty found[] set, and fill up a candidate[] >> set; as I find an "id", delete it from candidate[] and append to found[]. >> >> Other suggestions? >> >> /dps >> >> -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
