Getting total feature count for multiple layers using PyQGIS?

Question

I want the total feature count of all the features in all my layers. Doing it manually in QGIS 2.18.16 is too slow.

I have been trying PyQGIS, but am not good with PyQGIS.

Any tips?

Answer 1

List the vector layers and sum their feature counts:

sum([l.featureCount() for l in iface.mapCanvas().layers() if l.type()==QgsMapLayer.VectorLayer])

See PyQGIS: How to get the list of valid layers in TOC? and How do I get feature count of a QgsVectorLayer?