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
Unblock multi-line comment
Ctrl+5
Multi-line comment
Ctrl+4
NOTE: For my version of Spyder (3.1.4) if I highlighted the entire multi-line comment and used Ctrl+5 the block remained commented out. Only after highlighting a small portion of the multi-line comment did Ctrl+5 work.