Two-dimensional array tutorial?

[Martin Schneider]

Hi!

I'd like to handle two-dimensional arrays. My first choice, the numpy
library, doesn't seem to be an option due to compatibility issues (see
my other thread about python22.dll).

Is there a tutorial somewhere how to handle 2d-arrays with vanilla Python?

Thanks and best regards,
Martin

[Diez B. Roggisch]

Martin Schneider wrote:

Hi!

I'd like to handle two-dimensional arrays. My first choice, the numpy
library, doesn't seem to be an option due to compatibility issues (see
my other thread about python22.dll).

Is there a tutorial somewhere how to handle 2d-arrays with vanilla Python?

there isn't much to them, simply create an use:

foo = [[0 for _ in xrange(height)] for _ in xrange(width)]

or something similar. Then you just use

foo[x][y]

to access individual elements.

Alternatively, you can use the module "array" for the inner list to be more
memory-efficient.

Obviously you don't get any further operations on arrays such as
transposition, multiplication and the like.

Can't you just get Numpy (or it's predecessors, Numeric) compiled against
ptyhon2.2?

Diez

[Martin Schneider]

Diez B. Roggisch schrieb:

Can't you just get Numpy (or it's predecessors, Numeric) compiled against
ptyhon2.2?

I tried Numeric, but e.g. it doesn't seem to feature transpose...

How do I compile Numpy against python2.2? :-)

Thanks for your answers and best regards,
Martin

[Diez B. Roggisch]

Martin Schneider wrote:

Diez B. Roggisch schrieb:

>Can't you just get Numpy (or it's predecessors, Numeric) compiled against
ptyhon2.2?

I tried Numeric, but e.g. it doesn't seem to feature transpose...

How do I compile Numpy against python2.2? :-)

By following the instructions on their website? I don't know Windows, and I
don't know if Numpy is even released for python2.2, as that is ancient. If
not, you're pretty much out of luck.

Diez

[Robert Kern]

Martin Schneider wrote:

Diez B. Roggisch schrieb:

>Can't you just get Numpy (or it's predecessors, Numeric) compiled against
ptyhon2.2?

I tried Numeric, but e.g. it doesn't seem to feature transpose...

Yes, it does. Numeric.transpose()

How do I compile Numpy against python2.2? :-)

You cannot. The first version of numpy required Python >= 2.3.

--
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
that is made terrible by our own mad attempt to interpret it as though it had
an underlying truth."
-- Umberto Eco

[Martin Schneider]

Robert Kern schrieb:

Martin Schneider wrote:

>I tried Numeric, but e.g. it doesn't seem to feature transpose...

Yes, it does. Numeric.transpose()

Then I must have made a mistake. I'll look into it. Thanks for the
correction.

>How do I compile Numpy against python2.2? :-)

You cannot. The first version of numpy required Python >= 2.3.

Yeah, I read in your other post, which crossed mine. Sh*t :-)

Thanks and best regards,
Martin