>;
Sent: Wednesday, August 23, 2006 12:19 PM
Subject: Re: swapping numeric items in a list
> At Wednesday 23/8/2006 15:32, Jiang Nutao wrote:
>
>>This is what I got in the debugger:
>>
>>(Pdb) aa=array('b', [126, 55, 71, 112])
>>(Pdb) aa
>>array(&#x
At Wednesday 23/8/2006 15:32, Jiang Nutao wrote:
This is what I got in the debugger:
(Pdb) aa=array('b', [126, 55, 71, 112])
(Pdb) aa
array('b', [126, 55, 71, 112])
(Pdb) aa.byteswap()
(Pdb) aa
array('b', [126, 55, 71, 112])
Oh, sorry, to swap by two bytes "H" was the right typecode. But your
Jiang Nutao wrote:
> array.byteswap() won't work for me easily. I tried this before my 1st post.
> I defined
>
> aa = array('H', [0x12, 0x34, 0x56, 0x78])
>
> Then did byteswap aa.byteswap(). The result was
>
> array('H', [0x1200, 0x3400, 0x5600, 0x7800])
>
> You can see it byteswappe
]>
To: "Jiang Nutao" <[EMAIL PROTECTED]>
Cc:
Sent: Wednesday, August 23, 2006 11:28 AM
Subject: Re: swapping numeric items in a list
> At Wednesday 23/8/2006 14:44, Jiang Nutao wrote:
>
>>array.byteswap() won't work for me easily. I tried this before my 1st
>&g
At Wednesday 23/8/2006 14:44, Jiang Nutao wrote:
array.byteswap() won't work for me easily. I tried this before my 1st post.
I defined
aa = array('H', [0x12, 0x34, 0x56, 0x78])
Then did byteswap aa.byteswap(). The result was
array('H', [0x1200, 0x3400, 0x5600, 0x7800])
You can see it
Thank you all guys for the help. Guess I'm gonna pick bearophile's way. It's
fast, neat, and easy to read.
array.byteswap() won't work for me easily. I tried this before my 1st post.
I defined
aa = array('H', [0x12, 0x34, 0x56, 0x78])
Then did byteswap aa.byteswap(). The result was
ar
Jiang Nutao wrote:
> Hi,
>
> I simplify my problem like below
>
> To convert list
> aa = [0x12, 0x34, 0x56, 0x78]
> into
> [0x34, 0x12, 0x78, 0x56]
>
> How to do it fast? My real list is huge.
Mark Rintsch's suggestion appears best if applicable, but just to cite yet
other
ways to do
In <[EMAIL PROTECTED]>, Jiang Nutao
wrote:
> To convert list
> aa = [0x12, 0x34, 0x56, 0x78]
> into
> [0x34, 0x12, 0x78, 0x56]
>
> How to do it fast? My real list is huge.
Use the `array` module and the `array.byteswap()` method.
Ciao,
Marc 'BlackJack' Rintsch
--
http://mail.py
Jiang Nutao:
> To convert list
> aa = [0x12, 0x34, 0x56, 0x78]
> into
> [0x34, 0x12, 0x78, 0x56]
> How to do it fast? My real list is huge.
Note that:
>>> a = range(6)
>>> a
[0, 1, 2, 3, 4, 5]
>>> a[::2]
[0, 2, 4]
>>> a[1::2]
[1, 3, 5]
So you can do:
>>> a[::2], a[1::2] = a[1::2], a[::2
Jiang Nutao wrote:
> Hi,
>
> I simplify my problem like below
>
> To convert list
> aa = [0x12, 0x34, 0x56, 0x78]
> into
> [0x34, 0x12, 0x78, 0x56]
>
> How to do it fast? My real list is huge.
>
> Thanks a lot.
> Jason
Here's simple and probably fast enough way (but it won't work right on
for i in xrange(0, len(your_list), 2):
your_list[i], your_list[i + 1] = your_list[i + 1], your_list[i]
Jiang Nutao wrote:
> Hi,
>
> I simplify my problem like below
>
> To convert list
> aa = [0x12, 0x34, 0x56, 0x78]
> into
> [0x34, 0x12, 0x78, 0x56]
>
> How to do it fast? My real li
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