Storing printed values at Python Console of QGIS as variable?

Question

Based in this answer to Getting features in order they are selected using PyQGIS?, I ran following code at Python Console of QGIS 3 for getting features id in order they were selected.

def onSelectionChanged():
    try:
        id = iface.activeLayer().selectedFeatures()[0].id()
        print (id)
    except IndexError:
        print ("no feature selected")

iface.activeLayer().selectionChanged.connect( onSelectionChanged )

I tried above code out with shapefile visualized at following image, where docked attributes table was used to corroborate that printed values at Python Console had correct order.

How can I modify my function for storing printed id values at Python Console of QGIS, as a list variable, without using a file written on disk drive?

Answer 1

This has worked for me from the QGIS Python console:

selected_ids = []
print(selected_ids) # prints []

def onSelectionChanged():
    try:
        id = iface.activeLayer().selectedFeatures()[0].id()
        selected_ids.append(id)
    except IndexError:
        print ("no feature selected")

iface.activeLayer().selectionChanged.connect( onSelectionChanged )

# Now select some features 

print(selected_ids) # prints [423, 347]