Thanks for helps
This code almost meets my needs . But not accurate probability when not enough source elements. So I give up the not enough elements situation. For source list is growing fast, the bast situation just appear in the program starting 2012/8/26 Steven D'Aprano <steve+comp.lang.pyt...@pearwood.info> > On 08/25/2012 12:03 PM, 月忧茗 wrote: > > > In the FinalList, > > probability of ALIST's item appeared is 43% probability of BLIST's > > item appeared is 37% probability of CLIST's item appeared is 19% > > probability of DLIST's item appeared is 1% > > First, select one of the four lists with those appropriate probabilities. > Then once you selected a list, select one of its items randomly. > > import random > > def select_list(): > x = random.randint(1, 100) > if x <= 43: > return ALIST > elif x <= 80: # 43 + 37 > return BLIST > elif x <= 99: # + 19 > return CLIST > else: > return DLIST > > the_list = select_list() > the_item = random.choice(the_list) > > > > -- > Steven > -- > http://mail.python.org/mailman/listinfo/python-list >
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