In clear_ns function, set values to null
In clear_ns function, set values to null

Hasimir/brython,Hasimir/brython,brython-dev/brython,brython-dev/brython,Hasimir/brython,jonathanverner/brython,kikocorreoso/brython,brython-dev/brython,jonathanverner/brython,kikocorreoso/brython,kikocorreoso/brython,jonathanverner/brython,Hasimir/brython,jonathanverner/brython