How to create memory layer and populate fields?

[المشرف العام]

Seems like a basic operation using PyQGIS but can't see what I am missing. I want to create a memory layer with the exact same features and attributes from a shapefile. I have looked several posts such as:

• Copying attributes from point layer to memory linestring layer PYQGIS
• pyQGIS manually copy all features with attributes from a layer into a memory layer

The following script creates a memory layer, gets the correct fields and correct number of features but it doesn't populate the fields with data:

input = "C:/Users/Me/Desktop//example.shp"layer = QgsVectorLayer(example,"line","ogr")temp = QgsVectorLayer("LineString?crs=epsg:4326", "result", "memory")temp_data = temp.dataProvider()temp.startEditing()layer_fields = layer.dataProvider().fields().toList()attr = layer.dataProvider().fields().toList()temp_data.addAttributes(attr)temp.updateFields()feat = QgsFeature()for elem in layer.getFeatures(): feat.setGeometry(elem.geometry()) feat.setAttributes(attr) temp.addFeatures([feat]) temp.updateExtents()temp.commitChanges()QgsMapLayerRegistry.instance().addMapLayer(temp)

أكثر...