From kde-bindings  Sun Dec 28 15:12:47 2008
From: Luca Beltrame <einar () heavensinferno ! net>
Date: Sun, 28 Dec 2008 15:12:47 +0000
To: kde-bindings
Subject: [Kde-bindings] Python DataEngine problem
Message-Id: <200812281612.54095.einar () heavensinferno ! net>
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Hello,

I've been starting to play with Plasma and Python (KDE 4.2 beta 2), and I'v=
e=20
been trying to create a simple DataEngine. I wonder if these should be=20
installed as packages, with plasmapkg, or with something else, because I ca=
n't=20
seem to get them to work in the engine explorer.=20

I always get these errors:

Traceback (most recent call last):                                         =
                                                                           =
          =20
  File "/usr/share/kde4/apps/plasma_scriptengine_python/pydataengine.py", l=
ine=20
43, in init                                                                =
      =20
    self.module =3D __import__(self.plugin_name+'.main')                   =
                                                                           =
            =20
ImportError: No module named main                                          =
                                                                           =
          =20
Traceback (most recent call last):                                         =
                                                                           =
          =20
  File "/usr/share/kde4/apps/plasma_scriptengine_python/pydataengine.py", l=
ine=20
58, in sources                                                             =
      =20
    return self.pydataengine.sources()                                     =
                                                                           =
          =20
AttributeError: pydataengine                                               =
                                                                           =
          =20
Traceback (most recent call last):                                         =
                                                                           =
          =20
  File "/usr/share/kde4/apps/plasma_scriptengine_python/pydataengine.py", l=
ine=20
64, in sourceRequestEvent                                                  =
      =20
    return self.pydataengine.sourceRequestEvent(name)                      =
                                                                           =
          =20
AttributeError: pydataengine

My main.py and metadata.desktop files are attached, but it must be noted th=
at=20
this happens also with the sample DataEngine code present in SVN=20
(plasma_dataengine_pytime; exactly the same error).

Is there anything I'm doing wrong, or is there a bug?

I apologize in advance if the quality of the code is rather crude, I was ju=
st=20
trying an experiment.

Thanks!

P.S.: Please CC me in replies, I'm not subscribed.

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#!/usr/bin/env python


from PyQt4.QtCore import *
from PyKDE4.kdecore import *
from PyKDE4 import plasmascript
from Bio import Entrez # querying functions

class PyEUtilsEngine(plasmascript.DataEngine):

    def __init__(self, parent, args=None):
        plasmascript.DataEngine.__init__(self, parent)

    def init():

        Entrez.email = "testa_testa@graffiti.net"
        self.setMinimumPollingInterval(3000) # To comply with NCBI regulations

    def sources(self):

        sources = ["NCBI"]
        return sources

    def sourceRequestEvent(self, name):
        return updateSourceEvent(name)

    def updateSourceEvent(self, gene):

        handle = Entrez.esearch(name, db="gene")
        data = Entrez.read(handle)
        idlist = data["IdList"]

        self.setData("Genes",QVariant(idlist))

        return True

def CreateDataEngine(parent):
    return PyEutilsEngine(parent)



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[Desktop Entry]
Name=Python EUtils
Comment=DataEngine for NCBI's EUtils
Type=Service
Icon=preferences-system-time
ServiceTypes=Plasma/DataEngine
X-Plasma-API=python

X-KDE-PluginInfo-Author=Luca Beltrame
X-KDE-PluginInfo-Email=einar@heavensinferno.net
X-KDE-PluginInfo-Name=plasma-python-eutils-dataengine
X-KDE-PluginInfo-Version=0.0.1
X-KDE-PluginInfo-Website=http://www.dennogumi.org
X-KDE-PluginInfo-Category=EUtils
X-KDE-PluginInfo-Depends=
X-KDE-PluginInfo-License=GPL
X-KDE-PluginInfo-EnabledByDefault=true

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