determine 32 or 64 bit architecture with python 2.2

[Kai Rosenthal]

Hello,
how can I determine the architecture (32 or 64bit) with python 2.2 on
Windows or Unix (AIX, Solaris) OS, without the modul platform?
Thanks for your hints, Kai

[John Machin]

On Jun 19, 9:17 pm, Kai Rosenthal <[e-mail]:

Hello,
how can I determine the architecture (32 or 64bit) with python 2.2 on
Windows or Unix (AIX, Solaris) OS, without the modul platform?
Thanks for your hints, Kai

What happens when you fire up a 64-bit Python and type
import sys; sys.maxint
at it?

[David Rushby]

On Jun 19, 4:28 pm, John Machin <[e-mail]:

On Jun 19, 9:17 pm, Kai Rosenthal <[e-mail]:

Hello,
how can I determine the architecture (32 or 64bit) with python 2.2 on
Windows or Unix (AIX, Solaris) OS, without the modul platform?
Thanks for your hints, Kai

What happens when you fire up a 64-bit Python and type
import sys; sys.maxint
at it?

That's not suitable, because of the differences between LP64 and LLP64
(http://en.wikipedia.org/wiki/64-bit#64-bit_data_models ).

Try
python -c "import struct; print struct.calcsize('P')"
instead. That calculates the size of a pointer.

[Lenard Lindstrom]

David Rushby wrote:

On Jun 19, 4:28 pm, John Machin <[e-mail]:

>On Jun 19, 9:17 pm, Kai Rosenthal <[e-mail]:

>>Hello,
how can I determine the architecture (32 or 64bit) with python 2.2 on
Windows or Unix (AIX, Solaris) OS, without the modul platform?
Thanks for your hints, Kai

What happens when you fire up a 64-bit Python and type
import sys; sys.maxint
at it?

That's not suitable, because of the differences between LP64 and LLP64
(http://en.wikipedia.org/wiki/64-bit#64-bit_data_models ).

Try
python -c "import struct; print struct.calcsize('P')"
instead. That calculates the size of a pointer.

How about:

tuple.__itemsize__

since each tuple item is a pointer.

--
Lenard Lindstrom
<le***@telus.net>

[=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=]

Kai Rosenthal schrieb:

how can I determine the architecture (32 or 64bit) with python 2.2 on
Windows or Unix (AIX, Solaris) OS, without the modul platform?

On Windows, the architecture is always 32-bit, as Python 2.2 does not
support Win64. On Unix, looking for sys.maxint is enough for AIX
and Solaris.

Regards,
Martin

[=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=]

>What happens when you fire up a 64-bit Python and type

> import sys; sys.maxint
at it?

That's not suitable, because of the differences between LP64 and LLP64
(http://en.wikipedia.org/wiki/64-bit#64-bit_data_models ).

For the systems that the OP mentioned, sys.maxint is just fine:
AIX and Solaris both use LP64, and Windows is 32-bit only for
Python 2.2.

Regards,
Martin

[Evan Klitzke]

On 6/19/07, Kai Rosenthal <ka**********@tiscali.dewrote:

Hello,
how can I determine the architecture (32 or 64bit) with python 2.2 on
Windows or Unix (AIX, Solaris) OS, without the modul platform?
Thanks for your hints, Kai

For Unix systems you can probably use os.uname() and check what
architecture the kernel is built for. For example,

evan@thinkpad ~ $ python -c 'import os; print os.uname()[4]'
i686

As you can see, I'm on a 32 bit system.

--
Evan Klitzke <ev**@yelp.com>