hex

[hong zhang]

List,

I want to input hex number instead of int number. in type="int" in following,

parser.add_option("-F", "--forcemcs", dest="force_mcs", type="int", default=0, help="index of 11n mcs table. Default: 0.")

How can I do it?
Thanks.

--henry

[Diez B. Roggisch]

hong zhang schrieb:

You can't. You can get a string, and convert that with e.g.

int("FF", 16)

Or you can extend optparse to know a new type, should be possible. That
would have the advantage that the parser already knows about it & can
reject faulty input.

Diez

[Peter Otten]

hong zhang wrote:

Workaround for the lazy: '0xff' on the command line instead of 'ff'.

[Rhodri James]

On Thu, 19 Nov 2009 02:29:59 -0000, hong zhang <henryz...@yahoo.com>
wrote:

> List,

>
> I want to input hex number instead of int number. in type="int" in
> following,
>
> parser.add_option("-F", "--forcemcs", dest="force_mcs", type="int",
> default=0, help="index of 11n mcs table. Default: 0.")
>
> How can I do it?

Assuming you're talking about "optparse", just prefix the number with "0x"
on the command line:

python myscript.py -F 0xDEAD

If you don't want to have to type the leading "0x", you'll either have to
make yourself a custom type for optparse, or treat it as a string and do
the parsing and error handling afterwards. My recommendation is that you
don't do this: not prefixing your constants if they aren't decimal is an
accident waiting to happen.

--
Rhodri James *-* Wildebeest Herder to the Masses