A quick way to comment/uncomment lines in vim:

Put your cursor on the first # character, press Ctrl+V, and go down until the last commented line and press x, that will delete all the # characters vertically.


For commenting a block of text is almost the same:

- First, go to the first line you want to comment, press Ctrl+V. This will put the editor in the VISUAL BLOCK mode.

- Then using the arrow key and select until the last line.

- Now press Shift+I, which will put the editor in INSERT mode and then press #. This will add a hash to the first line.

- Then press Esc (give it a second), and it will insert a # character on all other selected lines.

#vim #comment #comment_out #visual_block

If you want to comment a block of code out in Jinja2 template, use {# ... #}. It can also span into multiple lines:

{#
      <tr class="">
          <td colspan="2" style="font-family:Ubuntu,Helvetica,Arial,sans-serif; padding: 0px 0px 0px 20px;" class="">
              Regards,
          </td>
      </tr>
      <tr class="">
          <td colspan="2" style="font-family:Ubuntu,Helvetica,Arial,sans-serif; padding: 0px 0px 30px 20px;" class="">
              SYSTEM INFO
          </td>
      </tr>
 #}

#python #jinja2 #comment #comment_out