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83 lines
2.9 KiB
Python
83 lines
2.9 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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TextToFloat.py
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---------------------
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Date : May 2010
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Copyright : (C) 2010 by Michael Minn
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Email : pyqgis at michaelminn dot com
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***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************
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"""
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__author__ = 'Michael Minn'
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__date__ = 'May 2010'
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__copyright__ = '(C) 2010, Michael Minn'
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# This will get replaced with a git SHA1 when you do a git archive
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__revision__ = '$Format:%H$'
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from PyQt4.QtCore import *
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from qgis.core import *
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from processing.core.GeoAlgorithm import GeoAlgorithm
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from processing.core.parameters import ParameterVector
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from processing.core.parameters import ParameterTableField
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from processing.core.outputs import OutputVector
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from processing.tools import dataobjects, vector
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class TextToFloat(GeoAlgorithm):
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INPUT = 'INPUT'
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FIELD = 'FIELD'
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OUTPUT = 'OUTPUT'
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def defineCharacteristics(self):
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self.name = 'Text to float'
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self.group = 'Vector table tools'
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self.addParameter(ParameterVector(
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self.INPUT, 'Input Layer', [ParameterVector.VECTOR_TYPE_ANY]))
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self.addParameter(ParameterTableField(
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self.FIELD, 'Text attribute to convert to float', self.INPUT,
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ParameterTableField.DATA_TYPE_STRING))
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self.addOutput(OutputVector(self.OUTPUT, 'Output'))
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def processAlgorithm(self, progress):
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layer = dataobjects.getObjectFromUri(
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self.getParameterValue(self.INPUT))
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fieldName = self.getParameterValue(self.FIELD)
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idx = layer.fieldNameIndex(fieldName)
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fields = layer.pendingFields()
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fields[idx] = QgsField(fieldName, QVariant.Double, '', 24, 15)
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writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(fields,
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layer.wkbType(), layer.crs())
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features = vector.features(layer)
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count = len(features)
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total = 100.0 / float(count)
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for count, f in enumerate(features):
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value = f[idx]
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try:
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if '%' in value:
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f[idx] = float(value.replace('%', '')) / 100.0
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else:
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f[idx] = float(value)
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except:
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f[idx] = None
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writer.addFeature(f)
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progress.setPercentage(int(count * total))
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del writer
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