[Qgis-developer] QGIS QgsVectorFileWriter

[Minoru Akagi]

Hi,

I guess that the 3rd argument (fields) should be a QgsFields object.
You can create it like this.

fields = QgsFields()
fields.append( QgsField( "id", QVariant.Int ) )
fields.append( QgsField( "desc", QVariant.String ) )

Cheers,
Minoru

2013/7/31 Bjorn Nyberg <bjorn.burr.nyberg at gmail.com>:
> I have a list of Linestrings [(x,y),(x,y)] pairs that i've created as
>
>     shapelist.append(([QgsPoint(x1,y1),QgsPoint(x2,y2)]))
>
>
> shapelist[:5]
> [[(4.11658e+06,5.18318e+06), (4.11717e+06,5.18218e+06)],
> [(4.11847e+06,5.18323e+06), (4.11771e+06,5.18223e+06)],
> [(4.1064e+06,5.17508e+06), (4.10647e+06,5.17408e+06)],
> [(4.10755e+06,5.1749e+06), (4.10693e+06,5.1739e+06)],
> [(4.11138e+06,5.15935e+06), (4.112e+06,5.15835e+06)]]
>
>
> MultiPolyLine = QgsGeometry.fromMultiPolyline(shapelist)
>
> However when I attempt to apply the writer by
>
> writer = QgsVectorFileWriter(out, "CP1250", fields, QGis.WKBMultiLineString,
> layer.crs(), "ESRI Shapefile")
>
> I receive the following traceback:
>
> Traceback (most recent call last):
>   File "<input>", line 1, in <module>
> TypeError: arguments did not match any overloaded call:
>   QgsVectorFileWriter(QString, QString, QgsFields, QGis.WkbType,
> QgsCoordinateReferenceSystem, QString driverName="ESRI Shapefile",
> QStringList datasourceOptions=QStringList(), QStringList
> layerOptions=QStringList(), QString newFilename=None): argument 3 has
> unexpected type 'dict'
>   QgsVectorFileWriter(QgsVectorFileWriter): argument 1 has unexpected type
> 'str'
>
>
> What does a Qstring imply here? Do I need to apply
> PyQt4.QtCore.QString(out)?
>
> Cheers,
> Bjorn
>
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