[GIS] QgsField : Undefined Variable

Question

Im writing a stand alone app in Python using QGIS 2.01 on Ubuntu via Eclipse bindings.

I've written code which successfully adds features to a new in memory layer and displays, but now I want to add attributes. The following code is giving an error : "Undefined Variable: QgsField" error despight importing both "qgis.core *" and specifically QgsField.

import os
import os.path
from PyQt4.QtGui import *
from PyQt4.QtCore import * 
from qgis.gui import *
from qgis.core import * 
from PyQt4.QtGui import QAction, QMainWindow
from PyQt4.QtCore import SIGNAL, Qt
from qgis.core import QgsVectorLayer, QgsField, QgsMapLayerRegistry  
from PyQt4.QtCore import QVariant 

Graphiclayers =  QgsMapLayerRegistry.instance().mapLayers().values() 
        GraphLyr = Graphiclayers[0]

        pr = GraphLyr.dataProvider() 
        # add fields
        pr.startediting()
        pr.addAttributes([QqsField('Colour', QVariant.Int),
                          QgsField('QTriad', QVariant.Int),
                          QgsField('QBox', QVariant.Int)])

Answer 1

(Ok then!)

There is a typo in the first QgsField, which is written QqsField. This probably causes your error.