open("output/mainwindow.h",'w') doesn't create a folder for me

[noagbodjivictor at gmail.com]

Hello
I have done python for some time now. I'm forgetting things.

This is the faulty line : outfile = open("output/mainwindow.h",'w')

I thought it would have created the folder ouput and the file
mainwindow.h for me but it's throwing an error