Why does 'return self' return None?

Question

I\'m trying to get the top node of a chain in getTopParent(). When I print out self.name, it indeed prints out the name of the parent instance; however

Answer 1

use return in

else:
    print( "checking %s" % self.name )
    return self.owner.getTopParent()

as None is the default return Value, then it'll output:

checking child3
checking child2
checking child1
Got top: parent
<__main__.A instance at 0xb77a628c>