Changing display name of layer with PyQGIS?

Question

I did a batch processing of several vector layers and now the display name for every file is "dissolved" when accessing the layer.name() function in QGIS. I read in this answer from underdark to Changing layer name of output vector from processing script in QGIS?, that I can set the name to the file name but unfortunaly too late.

I am able to get all the files in my project to be in a list with

layers = iface.mapCanvas().layers()

and all the names with this:

names = [layer.name() for layer in QgsMapLayerRegistry.instance().mapLayers().values()]

With the help of this answer to Getting path of project, or layer file in PyQGIS?, I can get the names of the file I am working with:

import os 
real_names = []
for li in layers:
   (myDirectory,nameFile) = os.path.split(li.dataProvider().dataSourceUri())
   real_names.append(nameFile.split("|")[0]

Reading the API docu for the QgsVectorLayer didnt helped me. What I want is to rename the files to show the filename as display name. How to archive that with the python console?

Answer 1

You could use something like the following to rename all layers to their respective filename (excluding the extension):

import os

for layer in QgsMapLayerRegistry.instance().mapLayers().values():
    basename = os.path.splitext(os.path.basename(layer.source()))[0]
    layer.setLayerName(basename)