[Qgis-developer] encoding in custom python functions

[Alexandre Neto]

Ah... I think I now understand what you are saying. You are saying that
expression files are always saved in your system default encoding system.

Sorry for the noise.

Lauri Kajan <lauri.kajan at gmail.com> escreveu no dia qui, 22/10/2015 às
13:25:

> Hi Alexandre,
>
> The u'ä' works if I tell the file encoding using your snippet
>
> # -*- coding: utf-8 -*-
>
> But this works only in qgis and is not a correct way.
> I cannot then debug my function in any IDE cause the file is encoded
> differently than it says.
>
> -Lauri
>
> On Thu, Oct 22, 2015 at 1:37 PM, Alexandre Neto <senhor.neto at gmail.com>
> wrote:
>
>> Have you tried to put the following line in the top of the file?
>>
>> # -*- coding: utf-8 -*-
>>
>>
>>
>> Lauri Kajan <lauri.kajan at gmail.com> escreveu no dia qui, 22/10/2015 às
>> 08:42:
>>
>>> Hi all,
>>>
>>> I'm trying to figure out some encoding problems when using custom python
>>> expression functions.
>>>
>>> I'm using python functions for defining some label texts. I need use
>>> some special characters like ä and ö.
>>>
>>> When a new file is created in function editor the file is encoded in my
>>> system encoding cp1252. At least the ä is coded to 0xe4 if I check that
>>> with hex-editor.
>>> Let the custom function just be
>>> @qgsfunction(args='auto', group='Custom')
>>> def encodingtest(feature, parent):
>>> return 'ä'
>>>
>>> This displays on a map like 'ä'
>>> It seems that the file is converted to utf-8 before execution and the ä
>>> is then coded to 0xc3 0xa4. Now QGIS still tries to interpret this as
>>> cp1252 and then displays this as 'ä'.
>>>
>>> It doesn't help to define the ä as unicode like u'ä' because QGIS still
>>> sees the ä as 0xc3 0xa4 and think that it is in cp1252.
>>>
>>> The only way to resolve this in the code at least that I have found is
>>> to use
>>> return 'ä'.decode('utf-8')
>>> This works on QGIS but the file can't be executed elsewhere (IDE) since
>>> the file is truly in cp1252 and 0xe4 can't be decoded using utf-8.
>>>
>>>
>>> Does anyone else confirm this and have I understood right the problem?
>>> Should I file a bug report?
>>>
>>>
>>> Thanks,
>>>
>>> -Lauri
>>> _______________________________________________
>>> Qgis-developer mailing list
>>> Qgis-developer at lists.osgeo.org
>>> http://lists.osgeo.org/mailman/listinfo/qgis-developer
>>
>>
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