How do I comment out multiple lines in Jupyter Ipython notebook? [closed]

Answer 1

I add the same situation and went in a couple of stackoverfow, github and tutorials showing complex solutions. Nothing simple though! Some with "Hold the alt key and move the mouse while the cursor shows a cross" which is not for laptop users (at least for me), some others with configuration files...

I found it after a good sleep night. My environment is laptop, ubuntu and Jupyter/Ipython 5.1.0 :

Just select/highlight one line, a block or something, and then "Ctrl"+"/" and it's magic :)

Answer 2

Quick Addition to Top Answer: CTRL + / is nice because it toggles back and forth between adding and removing # at beginning of all selected lines. Didn't see that exact nuance mentioned so just wanted to add it here. (This worked in Firefox Developer Edition 54.0b12 on Windows 7).

Answer 3

Fn + Cmd + / in Safari browser on MacOS

Answer 4

If you have a Mac and not a English keyboard: Cmd-/ is still easy to produce.

Follow the below steps:

1. Just go into the Mac's System Settings, Keyboard, tab "Input Sources" or whatever it might be called in English
2. Add the one for English (shows up as ABC, strange way to spell English).

Whenever you want a Cmd-/, you have to change to the ABC keyboard (in your menu row at the top of your screen,if you have ticked it to be shown there in the System Settings - Keyboard tab).

Cmd and the key to the left of the right "shift key" gives you Cmd-/.

P.S: Don't forget to switch back to your normal keyboard.

Answer 5

I tried this on Mac OSX with Chrome 42.0.2311.90 (64-bit) and this works by using CMD + /

The version of the notebook server is 3.1.0-cbccb68 and is running on:
Python 2.7.9 |Anaconda 2.1.0 (x86_64)| (default, Dec 15 2014, 10:37:34) 
[GCC 4.2.1 (Apple Inc. build 5577)]

Could it be a browser related problem? Did you try Firefox or IE?

Answer 6

On MacOS 10.11 with Firefox and a German keyboard layout it is Ctrl + ?