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

Groups > comp.lang.python > #65278

Re: [newbie] making rows of table with discrete values for different number systems

Show all headers | View raw

Jean Dupont wrote:

> I'm looking for an efficient method to produce rows of tables like this:
> 
> for base 2
> 0 0 0 0
> 0 0 0 1
> 0 0 1 0
> 0 0 1 1
> 0 1 0 0
> .
> .
> .
> 1 1 1 1
> 
> for base 3
> 0 0 0 0 0 0
> 0 0 0 0 0 1
> 0 0 0 0 0 2
> 0 0 0 0 1 0
> 0 0 0 0 1 1
> 0 0 0 0 1 2
> .
> .
> 2 2 2 2 2 2
> 
> As you can see the rows are always twice the size of the base
> I _don't_ need to have all rows available together in one array which
> would become too large for higher value number bases. It's sufficient to
> produce one row after the other, as I will do further data manipulation on
> such a row immediately.
> 
> If someone here could suggest best practices to perform this kind of
> operations,I'd really appreciate it very much

Have a look at itertools.product(): 

>>> import itertools
>>> for row in itertools.product(range(2), repeat=4):
...     print(*row)
... 
0 0 0 0
0 0 0 1
0 0 1 0
0 0 1 1
0 1 0 0
0 1 0 1
0 1 1 0
0 1 1 1
1 0 0 0
1 0 0 1
1 0 1 0
1 0 1 1
1 1 0 0
1 1 0 1
1 1 1 0
1 1 1 1

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

Thread

[newbie] making rows of table  with discrete values for different number systems Jean Dupont <jeandupont314@gmail.com> - 2014-02-02 09:44 -0800
  Re: [newbie] making rows of table  with discrete values for different number systems Roy Smith <roy@panix.com> - 2014-02-02 13:07 -0500
    Re: [newbie] making rows of table  with discrete values for different number systems Jean Dupont <jeandupont314@gmail.com> - 2014-02-03 07:06 -0800
  Re: [newbie] making rows of table with discrete values for different number systems Peter Otten <__peter__@web.de> - 2014-02-02 19:10 +0100
    Re: [newbie] making rows of table with discrete values for different number systems Jean Dupont <jeandupont314@gmail.com> - 2014-02-02 12:51 -0800
      Re: [newbie] making rows of table with discrete values for different number systems Asaf Las <roegltd@gmail.com> - 2014-02-02 17:56 -0800
        Re: [newbie] making rows of table with discrete values for different number systems Jean Dupont <jeandupont314@gmail.com> - 2014-02-03 07:05 -0800
          Re: [newbie] making rows of table with discrete values for different number systems Asaf Las <roegltd@gmail.com> - 2014-02-03 07:34 -0800
            Re: [newbie] making rows of table with discrete values for different number systems Jean Dupont <jeandupont314@gmail.com> - 2014-02-03 11:37 -0800
              Re: [newbie] making rows of table with discrete values for different number systems Asaf Las <roegltd@gmail.com> - 2014-02-03 11:50 -0800
                Re: [newbie] making rows of table with discrete values for different number systems Jean Dupont <jeandupont115@gmail.com> - 2014-02-04 01:18 -0800
              Re: [newbie] making rows of table with discrete values for different number systems Asaf Las <roegltd@gmail.com> - 2014-02-03 11:52 -0800
          Re: [newbie] making rows of table with discrete values for different number systems Terry Reedy <tjreedy@udel.edu> - 2014-02-03 16:50 -0500
            Re: [newbie] making rows of table with discrete values for different number systems Rustom Mody <rustompmody@gmail.com> - 2014-02-03 18:48 -0800
  Re: [newbie] making rows of table  with discrete values for different number systems Denis McMahon <denismfmcmahon@gmail.com> - 2014-02-04 00:11 +0000

csiph-web