Python: Returns flat list of objects from recursive function

Recursive function for list of objects | .py

def get_nodes(items=[], ages=[]):
    myresults = []
    print "Searching..."
    # pseudo code
    for item in items:
        if item.age in ages:
            print "\t","valid age"
            myresults.append(item)

        myresults.extend( get_nodes(items=item.children, ages=ages) )

    return myresults