I recently changed from the Enthought Canopy Python distribution to Anaconda, which includes the Spyder IDE.
In Canopy\'s code editor, it was possible to comment and unc
While the other answers got it right when it comes to add comments, in my case only the following worked.
Multi-line comment
select the lines to be commented + Ctrl + 4
Multi-line uncomment
select the lines to be uncommented + Ctrl + 1