I want to create a desktop environment for Ubuntu and Linux can you tell me how to do that i want the best easiest way to do that. can i use qt Linux embedded to do that if it is then i want to use that only tell me which library how it can be done using python which packages to download and import i want to work more on main things rather than other things i can use c++ too but adding library to c++ is a big pain especially with ides such as eclipse , net beans if i can do it with qt easily tell the system package
Why create a Desktop Environment from scratch if there are so many free ones available?
Pick one that you like, grab its sources, and modify it to your tastes. No need to reinvent the wheel. Besides, a DE is not a 1-man job... It takes years, and hundreds (thousands?) of developers.
Studying an existent DE is the best way to learn how to build your own, if you really want to. If you like working with QT, then KDE might be a good starting point.