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Subject: Re: How to turn a string into a list of integers?
From: Kurt Mueller <kurt.alfred.mueller@gmail.com>
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Date: Fri, 5 Sep 2014 19:56:16 +0200
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Xref: csiph.com comp.lang.python:77603

Am 05.09.2014 um 10:42 schrieb cl@isbd.net:

> Joshua Landau <joshua@landau.ws> wrote:
>> On 3 September 2014 15:48,  <cl@isbd.net> wrote:
>>> Peter Otten <__peter__@web.de> wrote:
>>>>>>> [ord(c) for c in "This is a string"]
>>>> [84, 104, 105, 115, 32, 105, 115, 32, 97, 32, 115, 116, 114, 105, =
110, 103]
>>>>=20
>>>> There are other ways, but you have to describe the use case and =
your Python
>>>> version for us to recommend the most appropriate.
>>>>=20
>>> That looks OK to me.  It's just for outputting a string to the block
>>> write command in python-smbus which expects an integer array.
>>=20
>> Just be careful about Unicode characters.
>=20
> I have to avoid them completely because I'm sending the string to a
> character LCD with a limited 8-bit only character set.


Could someone please explain the following behavior to me:
Python 2.7.7, MacOS 10.9 Mavericks

>>> import sys
>>> sys.getdefaultencoding()
'ascii'
>>> [ord(c) for c in 'A=C4']
[65, 195, 132]
>>> [ord(c) for c in u'A=C4']
[65, 196]

My obviously wrong understanding:
=82A=C4=91 in =82ascii=91 are two characters
     one with ord A=3D65 and
     one with ord =C4=3D196 ISO8859-1 <depends on code table>
     =97-> why [65, 195, 132]
u=92A=C4=92 is an Unicode string
     =97-> why [65, 196]

It is just the other way round as I would expect.



Thank you
--=20
Kurt Mueller, kurt.alfred.mueller@gmail.com