Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #8020

Re: How to iterate on a changing dictionary

Show all headers | View raw

On 6/20/2011 10:30 AM, Florencio Cano wrote:
>> To make an example: imaging Bingo.Shuffle the numbers, each number sorted
>> should be removed from the container, how would it implemented?
>
> The structure seems a set ->  unordered collection of unique elements.
>
> You can select a random element from the set with
> random.sample(container, num_of_elems)
>
> And then remove the elem from the set with remove.

random.sample(someset) just turns the set into a sequence (tuple).
For bingo, where you will play multiple games,
start with an immutable collection balls = ('A1', 'A2', ...)
that you cannot accidentally modify and can repeatedly copy.
For each game, copy to a list game = list(balls).
Then random.shuffle(game), and game.pop() balls as needed.

Other situations will need other solutions.

-- 
Terry Jan Reedy

Back to comp.lang.python | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

How to iterate on a changing dictionary TheSaint <nobody@nowhere.net.no> - 2011-06-19 22:32 +0800
  Re: How to iterate on a changing dictionary Chris Angelico <rosuav@gmail.com> - 2011-06-20 01:13 +1000
    Re: How to iterate on a changing dictionary Roy Smith <roy@panix.com> - 2011-06-19 11:53 -0400
      Re: How to iterate on a changing dictionary Terry Reedy <tjreedy@udel.edu> - 2011-06-19 12:51 -0400
  Re: How to iterate on a changing dictionary Terry Reedy <tjreedy@udel.edu> - 2011-06-19 12:02 -0400
  Re: How to iterate on a changing dictionary Lie Ryan <lie.1296@gmail.com> - 2011-06-20 03:00 +1000
    Re: How to iterate on a changing dictionary TheSaint <nobody@nowhere.net.no> - 2011-06-20 21:20 +0800
      Re: How to iterate on a changing dictionary Florencio Cano <florencio.cano@gmail.com> - 2011-06-20 16:30 +0200
      Re: How to iterate on a changing dictionary Terry Reedy <tjreedy@udel.edu> - 2011-06-20 13:37 -0400
        Re: How to iterate on a changing dictionary TheSaint <nobody@nowhere.net.no> - 2011-06-21 18:44 +0800

csiph-web