Re: [Qgis-developer] Do Python plugins already work with QGIS 3?

[Jürgen E . Fischer]

Hi Andreas,

On Tue, 13. Dec 2016 at 15:51:26 +0100, Andreas Neumann wrote:
> I compiled and installed QGIS 3 - which worked fine.

BTW for debian and ubuntu there nightlies builds in
http://qgis.org/debian-nightly.


Jürgen

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Re: [Qgis-developer] Do Python plugins already work with QGIS 3?

[Andreas Neumann]

ah - yes, now it works after Martins fix.

So a side-effect of your refactoring.

No problem

Thanks all who gave me hints. I should be fine now.

Andreas


On 13.12.2016 17:21, Martin Dobias wrote:

On Wed, Dec 14, 2016 at 12:00 AM, Andreas Neumann  wrote:

However, db manager still fails to start with error message:

--

2016-12-13T16:53:211Traceback (most recent call last):
   File
"/usr/local/share/qgis/python/plugins/db_manager/db_manager_plugin.py", line
108, in run
 from .db_manager import DBManager
   File "/usr/local/share/qgis/python/qgis/utils.py", line 647,
in _import
 mod = _builtin_import(name, globals, locals, fromlist,
level)
   File
"/usr/local/share/qgis/python/plugins/db_manager/db_manager.py", line 36, in

 from .layer_preview import LayerPreview
   File "/usr/local/share/qgis/python/qgis/utils.py", line 647,
in _import
 mod = _builtin_import(name, globals, locals, fromlist,
level)
   File
"/usr/local/share/qgis/python/plugins/db_manager/layer_preview.py", line 27,
in 
 from qgis.gui import QgsMapCanvas, QgsMapCanvasLayer,
QgsMessageBar
 ImportError: cannot import name 'QgsMapCanvasLayer'

My bad - should be fixed now in latest master.

Cheers
Martin


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Re: [Qgis-developer] Do Python plugins already work with QGIS 3?

[Martin Dobias]

On Wed, Dec 14, 2016 at 12:00 AM, Andreas Neumann  wrote:
>
> However, db manager still fails to start with error message:
>
> --
>
> 2016-12-13T16:53:211Traceback (most recent call last):
>   File
> "/usr/local/share/qgis/python/plugins/db_manager/db_manager_plugin.py", line
> 108, in run
> from .db_manager import DBManager
>   File "/usr/local/share/qgis/python/qgis/utils.py", line 647,
> in _import
> mod = _builtin_import(name, globals, locals, fromlist,
> level)
>   File
> "/usr/local/share/qgis/python/plugins/db_manager/db_manager.py", line 36, in
> 
> from .layer_preview import LayerPreview
>   File "/usr/local/share/qgis/python/qgis/utils.py", line 647,
> in _import
> mod = _builtin_import(name, globals, locals, fromlist,
> level)
>   File
> "/usr/local/share/qgis/python/plugins/db_manager/layer_preview.py", line 27,
> in 
> from qgis.gui import QgsMapCanvas, QgsMapCanvasLayer,
> QgsMessageBar
> ImportError: cannot import name 'QgsMapCanvasLayer'

My bad - should be fixed now in latest master.

Cheers
Martin
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Re: [Qgis-developer] Do Python plugins already work with QGIS 3?

[Andreas Neumann]

yes - I used the instructions from 
https://github.com/qgis/QGIS/blob/master/INSTALL


but all "geo" libraries (geos, gdal, spatialite, postgres/postgis) had 
been installed from source.


Is there a dependency python module list for db manager available?

python3-psycopg is installed. Any other SQL modules or other modules the 
DB manager requires?


Andreas


On 13.12.2016 17:02, Paolo Cavallini wrote:

Il 13/12/2016 17:00, Andreas Neumann ha scritto:


Can you confirm that DB-manager should work fine with the latest master?

I confirm. Probably other py3 packages are missing.
Did you insall what is in the requirements?
All the best.



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Re: [Qgis-developer] Do Python plugins already work with QGIS 3?

[Paolo Cavallini]

Il 13/12/2016 17:00, Andreas Neumann ha scritto:

> Can you confirm that DB-manager should work fine with the latest master?

I confirm. Probably other py3 packages are missing.
Did you insall what is in the requirements?
All the best.

-- 
Paolo Cavallini - www.faunalia.eu
QGIS & PostGIS courses: http://www.faunalia.eu/training.html
https://www.google.com/trends/explore?date=all=IT=qgis,arcgis
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Re: [Qgis-developer] Do Python plugins already work with QGIS 3?

[Andreas Neumann]

Hi Marco,

Thanks - this helped a lot. Apparently it was the missing python3-gdal 
bindings. I only had the bindings for python2. Processing now seems to 
work fine (at least the few tests I did).


However, db manager still fails to start with error message:

--

2016-12-13T16:53:211Traceback (most recent call last):
  File 
"/usr/local/share/qgis/python/plugins/db_manager/db_manager_plugin.py", 
line 108, in run

from .db_manager import DBManager
  File "/usr/local/share/qgis/python/qgis/utils.py", line 
647, in _import
mod = _builtin_import(name, globals, locals, fromlist, 
level)
  File 
"/usr/local/share/qgis/python/plugins/db_manager/db_manager.py", line 
36, in 

from .layer_preview import LayerPreview
  File "/usr/local/share/qgis/python/qgis/utils.py", line 
647, in _import
mod = _builtin_import(name, globals, locals, fromlist, 
level)
  File 
"/usr/local/share/qgis/python/plugins/db_manager/layer_preview.py", line 
27, in 
from qgis.gui import QgsMapCanvas, QgsMapCanvasLayer, 
QgsMessageBar

ImportError: cannot import name 'QgsMapCanvasLayer'

--

Can you confirm that DB-manager should work fine with the latest master?

Thanks,

Andreas


On 13.12.2016 16:40, Marco Bernasocchi wrote:

could be,
it could also be a PYTHONPATH issue depenndign where you installed the
bindings.

can you import them in a python prompt?

to build gdal with python 3 you need to do some thing like:
cd gdal/swig/python
python3 setup.py build & python3 setup.py install

IIRC gdal compiles in its source dir so for qgis for android I just used
to copy the whole GDAL folder before building to keep a clean copy.

more info:
https://trac.osgeo.org/gdal/wiki/GdalOgrInPython
https://trac.osgeo.org/gdal/wiki/BuildingOnUnix

ciao
Marco


On 13.12.2016 16:23, Andreas Neumann wrote:

Hi,

I get a message:



Unable to load GdalTools plugin.

The required "osgeo [python-gdal]" module is missing.

Install it and try again.





then there is a new error message:


--


ImportError: No module named 'osgeo'


--


I installed gdal from source, but enabled Python and also enabled shared
libraries.


Could it be that gdal was compiled with Python 2 while QGIS runs with
Python 3?


If that's the case, how can i compile GDAL with Python 3 support?


Can I compile gdal with Python 2 and 3 support if I want QGIS 2.x and
3.x on the same machine?

Thanks,
Andreas

On 13.12.2016 15:55, Tom Chadwin wrote:

Define "fail", I guess. Most plugins won't work without modification
[citation needed], but it would be good to know *how* it fails, as you are
right that there could be a more general issue.



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Re: [Qgis-developer] Do Python plugins already work with QGIS 3?

[Marco Bernasocchi]

could be,
it could also be a PYTHONPATH issue depenndign where you installed the
bindings.

can you import them in a python prompt?

to build gdal with python 3 you need to do some thing like:
cd gdal/swig/python
python3 setup.py build & python3 setup.py install

IIRC gdal compiles in its source dir so for qgis for android I just used
to copy the whole GDAL folder before building to keep a clean copy.

more info:
https://trac.osgeo.org/gdal/wiki/GdalOgrInPython
https://trac.osgeo.org/gdal/wiki/BuildingOnUnix

ciao
Marco


On 13.12.2016 16:23, Andreas Neumann wrote:
> Hi,
> 
> I get a message:
> 
> 
> 
> Unable to load GdalTools plugin.
> 
> The required "osgeo [python-gdal]" module is missing.
> 
> Install it and try again.
> 
> 
> 
> 
> 
> then there is a new error message:
> 
> 
> --
> 
> 
> ImportError: No module named 'osgeo'
> 
> 
> --
> 
> 
> I installed gdal from source, but enabled Python and also enabled shared
> libraries.
> 
> 
> Could it be that gdal was compiled with Python 2 while QGIS runs with
> Python 3?
> 
> 
> If that's the case, how can i compile GDAL with Python 3 support?
> 
> 
> Can I compile gdal with Python 2 and 3 support if I want QGIS 2.x and
> 3.x on the same machine?
> 
> Thanks,
> Andreas
> 
> On 13.12.2016 15:55, Tom Chadwin wrote:
>> Define "fail", I guess. Most plugins won't work without modification
>> [citation needed], but it would be good to know *how* it fails, as you are
>> right that there could be a more general issue.
>>
>>
>>
>> -
>> Buy Pie Spy: Adventures in British pastry 2010-11 on Amazon 
>> --
>> View this message in context: 
>> http://osgeo-org.1560.x6.nabble.com/Do-Python-plugins-already-work-with-QGIS-3-tp5299693p5299694.html
>> Sent from the Quantum GIS - Developer mailing list archive at Nabble.com.
>> ___
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> 
> 
> 
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-- 
Marco Bernasocchi
OPENGIS.ch - berna.io - 27summits.ch



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Re: [Qgis-developer] Do Python plugins already work with QGIS 3?

[Andreas Neumann]

Hi,

I get a message:



Unable to load GdalTools plugin.

The required "osgeo [python-gdal]" module is missing.

Install it and try again.





then there is a new error message:


--


ImportError: No module named 'osgeo'


--


I installed gdal from source, but enabled Python and also enabled shared 
libraries.



Could it be that gdal was compiled with Python 2 while QGIS runs with 
Python 3?



If that's the case, how can i compile GDAL with Python 3 support?


Can I compile gdal with Python 2 and 3 support if I want QGIS 2.x and 
3.x on the same machine?


Thanks,
Andreas

On 13.12.2016 15:55, Tom Chadwin wrote:

Define "fail", I guess. Most plugins won't work without modification
[citation needed], but it would be good to know *how* it fails, as you are
right that there could be a more general issue.



-
Buy Pie Spy: Adventures in British pastry 2010-11 on Amazon
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Re: [Qgis-developer] Do Python plugins already work with QGIS 3?

[Marco Bernasocchi]

well, for once most plugins will fail at from PyQt4 import *, then they
could fail at any API break.

the core plugins go trough 2to3
(https://github.com/qgis/QGIS/blob/master/scripts/2to3) that should
fixup most of the problems.

on ubuntu 16.10 DBman and processing work.

If you are porting a plugin to QGIS3 I suggest you to have a look at the
qgis2compat plugin which will make your life much easier in keeping a
plugin working wut the QGIS 2 and 3 API.

www.opengis.ch/qgis2compat

ciao
Marco

On 13.12.2016 15:55, Tom Chadwin wrote:
> Define "fail", I guess. Most plugins won't work without modification
> [citation needed], but it would be good to know *how* it fails, as you are
> right that there could be a more general issue.
> 
> 
> 
> -
> Buy Pie Spy: Adventures in British pastry 2010-11 on Amazon 
> --
> View this message in context: 
> http://osgeo-org.1560.x6.nabble.com/Do-Python-plugins-already-work-with-QGIS-3-tp5299693p5299694.html
> Sent from the Quantum GIS - Developer mailing list archive at Nabble.com.
> ___
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> 

-- 
Marco Bernasocchi
OPENGIS.ch - berna.io - 27summits.ch



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Re: [Qgis-developer] Do Python plugins already work with QGIS 3?

[Richard Duivenvoorde]

On 12/13/2016 03:51 PM, Andreas Neumann wrote:

Hi,

I compiled and installed QGIS 3 - which worked fine. But at start of
QGIS, none of the Python plugins seem to work, e.g. processing,
db-manager, etc. all fail.

Is this expected behaviour or is there something in my compile settings
that would make these Python "core" plugins work in QGIS 3.0 on Python 3?


During compilation there is (was?) a script which fixed python2 lingua 
to python3 (scripts/2to3). You need python3 future for that (on Debian):


pip3 install future

Maybe during your compilation/installation this step failed?

There are also some plugins already (preliminary, as api can still 
change) ported to 3:


https://plugins.qgis.org/plugins/plugins.xml?qgis=3.0

The Core plugins you name, work here with me on Debian testing.

Regards,

Richard


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Re: [Qgis-developer] Do Python plugins already work with QGIS 3?

[Mathieu Pellerin]

Processing and db manager works under QGIS. What are the error messages you
get? I d suspect missing Python 3 modules/packages being problem here.

On Dec 13, 2016 21:51, "Andreas Neumann"  wrote:

> Hi,
>
> I compiled and installed QGIS 3 - which worked fine. But at start of QGIS,
> none of the Python plugins seem to work, e.g. processing, db-manager, etc.
> all fail.
>
> Is this expected behaviour or is there something in my compile settings
> that would make these Python "core" plugins work in QGIS 3.0 on Python 3?
>
> Thanks,
>
> Andreas
>
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Re: [Qgis-developer] Do Python plugins already work with QGIS 3?

[Paolo Cavallini]

Il 13/12/2016 15:51, Andreas Neumann ha scritto:
> Hi,
> 
> I compiled and installed QGIS 3 - which worked fine. But at start of
> QGIS, none of the Python plugins seem to work, e.g. processing,
> db-manager, etc. all fail.

Processing etc. working here on master.
All the best.

-- 
Paolo Cavallini - www.faunalia.eu
QGIS & PostGIS courses: http://www.faunalia.eu/training.html
https://www.google.com/trends/explore?date=all=IT=qgis,arcgis
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Re: [Qgis-developer] Do Python plugins already work with QGIS 3?

[Tom Chadwin]

Define "fail", I guess. Most plugins won't work without modification
[citation needed], but it would be good to know *how* it fails, as you are
right that there could be a more general issue.



-
Buy Pie Spy: Adventures in British pastry 2010-11 on Amazon 
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