Carlos wrote: > Hello, > > I am wondering if it is possible to create lists on the fly. This is an FAQ. The more general question is "Can I create variables with dynamically generated names." The answers are: (1) Yes (2) This is rarely a good idea. The preferred solution is to use a dict or list, each item of which is one of the "variables" you want to create. Use a list if the names, like yours, are of the form
list_1, list_2, ..., list_n. Then refer to the list with n as the list index. To apply to your example: list_ = [[] for x in xrange(5)] # creates [[], [], [], [], []]. Then you may refer to list_[0], list_[1], etc. > The script > that I'm working on needs a number of parameters, one of those is > population, and this corresponds to the number of solutions that a > genetic algorithm generates on each generation (iteration). The thing is > that I need to generate one list for each population member and then > append the corresponding population members to that particular list. > > This is only so you can have an idea: > > for i in range(5): > 'list_%i' % (i) = [] > > or: > > for i in range(5): > lista_+'%i' % (i) = [] > > :-[ > > Is this possible? > > Thanks in advance, > And Merry Christmas, > Carlos > > > _______________________________________________ > Tutor maillist - Tutor@python.org > http://mail.python.org/mailman/listinfo/tutor > > -- Bob Gailer 510-978-4454 _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
