[PyQt] Custom QWidget FramelessWindowHint consumption ?

[Estrada Matthieu]

Hello,

I am developing an application in which I want to customize my windows 
(borders, titles and buttons).

For the moment the only way I have found is to apply 
"Qt.FramelessWindowsHint" flag, then add custom buttons to min, max, 
close my window and add my own border with css.

I want to know if this is the best practice to do that and the least 
resource-intensive ?

Can I customize this kin of things by another way ?

Thanks