initialize a dictionary

[shama.bell@gmail.com]

Hello,

Can I do something like this?

table = {}
table[32, 16] = 0x0

Where 32 specifies rows and 16 specifies columns and i am trying to
initialize it to zero

I should be able to do comparisons like:
table[t1, t2] == 0x1 etc.
-SB

[Sean Blakey]

Re: initialize a dictionary

On 30 Mar 2005 13:02:05 -0800, shama.bell@gmai l.com
<shama.bell@gma il.com> wrote:[color=blue]
> Hello,
>
> Can I do something like this?
>
> table = {}
> table[32, 16] = 0x0
>
> Where 32 specifies rows and 16 specifies columns and i am trying to
> initialize it to zero
>
> I should be able to do comparisons like:
> table[t1, t2] == 0x1 etc.
> -SB
>[/color]

Try it. It works. Sort of.

This code actually creates a dict named "table" mapping the key tuple
(32, 16) to the value 0x0. Note that you are NOT creating a
two-dimensional array, so this approach may be problematic if you ever
need to iterate values "by row" or "by column".

There is a python F.A.Q. on this, which you may find useful:

http://www.python.org/doc/faq/programming.html#how-do-i-create-a-multidimensional-list

--
Sean Blakey
Saint of Mild Amusement, Evil Genius, Big Geek
Python/Java/C++/C(Unix/Windows/Palm/Web) developer
quine = ['print "quine =",quine,"; exec(quine[0])"'] ; exec(quine[0])

[shama.bell@gmail.com]

Re: initialize a dictionary

The F.A.Q. does not explain how to create a 2 dimensional array and
initialize it to zero.

I need to iterate values by row and column as well.

I tried this....
w,x = 32, 16
A = [ [0x0]*w for i in range(x)]
print A
It does not create a 2 dimensional array with 32 rows and 16 columns

Thanks,
-SB

[Steven Bethard]

Re: initialize a dictionary

shama.bell@gmai l.com wrote:[color=blue]
> I need to iterate values by row and column as well.
>
> I tried this....
> w,x = 32, 16
> A = [ [0x0]*w for i in range(x)]
> print A[/color]

py> import numarray
py> print numarray.zeros( (16, 8))
[[0 0 0 0 0 0 0 0]
[0 0 0 0 0 0 0 0]
[0 0 0 0 0 0 0 0]
[0 0 0 0 0 0 0 0]
[0 0 0 0 0 0 0 0]
[0 0 0 0 0 0 0 0]
[0 0 0 0 0 0 0 0]
[0 0 0 0 0 0 0 0]
[0 0 0 0 0 0 0 0]
[0 0 0 0 0 0 0 0]
[0 0 0 0 0 0 0 0]
[0 0 0 0 0 0 0 0]
[0 0 0 0 0 0 0 0]
[0 0 0 0 0 0 0 0]
[0 0 0 0 0 0 0 0]
[0 0 0 0 0 0 0 0]]

STeVe