Comment uncomment - jcb91/IPython-notebook-extensions-wiki GitHub Wiki
Toggle line comments in a codecell using ´Alt-C´hotkey. Marking several lines will toggle comments for all selected lines.
Note: This functionality is already available in the IPython notebook using Ctrl+/. The reason for adding this extension is that current IPython versions cannot handle some keys for international keyboards.
Installation
Follow the installation instructions appropriate to your IPython version as explained on the main wiki home pages: