[Pywps-dev] Import qgis.core into PyWPS process

Mon Jan 2 12:54:49 PST 2017

I have checked the GetCapabilities by accessing:
http://localhost:8080/cgi-bin/pywps.cgi?service=wps&request=GetCapabilities&version=1.0.0
and it is okay. I can even execute the example process "inputs_added".

Then a have checked the log messages and the result is:

PyWPS [2017-01-02 18:49:34,355] INFO: Setting PYWPS_PROCESSES from
configuration file to c:/pywps/pywps_processes
PyWPS [2017-01-02 18:49:34,388] WARNING: Could not import processes from
'pywps_processes': ImportError('No module named qgis.core',)
PyWPS [2017-01-02 18:49:34,424] INFO: Following processes are imported:
['inputs_added']
Traceback (most recent call last):
  File "C:/pywps\pywps\Wps\__init__.py", line 174, in _init_from_directory
    [processSources.__name__])
  File "c:/pywps/pywps_processes\processing.py", line 2, in <module>
    from qgis.core import *
ImportError: No module named qgis.core

As we can see, the only process imported was the "input_added", while my
other algorithm "processing" gave an ImportError.

Eduardo,

2017-01-02 18:42 GMT-02:00 Jáchym Čepický <jachym.cepicky at gmail.com>:

> Hi,
>
> first check, if your GetCapabilities response is ok (
> http://server/wps?service=wps&request=getcapabilities) - maybe the plugin
> is corrupted (it's not the stablest piece of software).
>
> Then please one more time: check the error.log of your web server, there
> should be written more - you can pass any exception or error message either
> to the mailing list or share it via pastebin.net or similar service
>
> J
>
> Dne 2.1.2017 v 21:38 Eduardo Silverio da Silva napsal(a):
>
>> In my case I am using QGIS 2.18 (x32) and Python 2.7.13 (x32) on Windows
>> 10, and I have already added the following environment variables:
>>
>> PYTHONPATH:
>> C:\Program Files (x86)\QGIS 2.18\apps\qgis\python
>> C:\Program Files (x86)\QGIS 2.18\apps\qgis\python\plugins
>> C:\Program Files (x86)\QGIS 2.18\apps\Python27\Lib\site-packages
>>
>> PATH:
>> C:\Program Files (x86)\QGIS 2.18\bin
>> C:\Program Files (x86)\QGIS 2.18\apps\qgis\bin
>> C:\Python27
>> C:\Python27\Scripts
>>
>> Here is the code where I want to import the classes:
>>
>> #I would like to use these classes:
>> # from qgis.core import *
>> # from qgis.gui import *
>> # from processing.core.Processing import Processing
>> # import processing
>>
>> from pywps.Process import WPSProcess
>> from types import FloatType
>>
>> class Process(WPSProcess):
>>      def __init__(self):
>>          WPSProcess.__init__(self,
>>               identifier       = "processar",
>>               title            = "Title",
>>               version          = "1",
>>               storeSupported   = "false",
>>               statusSupported  = "false",
>>               abstract         = "Abstract")
>>
>>          self.value1 = self.addLiteralInput(identifier = "value1", title
>> =
>> "Input 1", type = FloatType)
>>          self.value2 = self.addLiteralInput(identifier = "value2", title
>> =
>> "Input 2", type = FloatType)
>>          self.result = self.addLiteralOutput(identifier = "result",
>> title =
>> "Result", type = FloatType)
>>
>>      def execute(self):
>>     # Here I would like to write the necessary code to execute the
>> qgis:extractnodes algorithm:
>>     # processing.runalg('qgis:extractnodes', 'river.shp', 'output.shp')
>>
>> v1 = self.value1.getValue()
>>          v2 = self.value2.getValue()
>>          self.result.setValue(v1 + v2)
>>          return
>> --------------------------------------
>>
>> But even with those PATH variables configured I could not access the
>> algorithm via WPS-client plugin.
>>
>> Regards,
>>
>>
>> 2017-01-02 17:31 GMT-02:00 Salvatore Larosa <lrssvtml at gmail.com>:
>>
>> Hi,
>>>
>>> On Mon, Jan 2, 2017 at 4:31 PM, Eduardo Silverio da Silva <
>>> eduardosilverio1990 at gmail.com> wrote:
>>>
>>> Hello people,
>>>>
>>>> I have a python script that uses some classes from qgis and it runs
>>>> correctly in my standalone app (IDLE Python). But when I try to publish
>>>> the
>>>> script through PyWPS (3.2.5), the process does not apear in the list of
>>>> GetCapabilities. I think the problem is with the following imports:
>>>>
>>>> from qgis.core import *
>>>> from qgis.gui import *
>>>> from processing.core.Processing import Processing
>>>>
>>>> When I comment these lines the algorithm is showed.
>>>>
>>>>
>>> I guess the problem is with your environment variable, you should add the
>>> QGIS python and plugins paths to PYTHONPATH and probably the QGIS lib
>>> path
>>> to LD_LIBRARY.
>>>
>>> Also, any error message could be useful in order to get some help from
>>> the
>>> community. :)
>>>
>>> Regards,
>>> -SL
>>>
>>>
>>> --
>>> Salvatore Larosa
>>> linkedIn: http://linkedin.com/in/larosasalvatore
>>> twitter: @lrssvt
>>> skype: s.larosa
>>> IRC: lrssvt on freenode
>>>
>>>
>>
>>
>>
>>
>> _______________________________________________
>> pywps-dev mailing list
>> pywps-dev at lists.osgeo.org
>> http://lists.osgeo.org/mailman/listinfo/pywps-dev
>>
>>
> --
> Jachym Cepicky
> e-mail: jachym.cepicky at gmail.com
> twitter: @jachymc
>

-- 
Eduardo Silverio da Silva
Mestrando em Ciências Geodésicas na Universidade Federal do Paraná
Engenheiro Cartógrafo e Agrimensor
+55 41 99873-6274
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/pywps-dev/attachments/20170102/11c89021/attachment.html>