The code output toggle button (the `>>>` button on the top right) has been disappeared and not functional on the current online documentation (both 3.4+ and 2.7). 


For example, see any doc page that has interpreter outputs:

    https://docs.python.org/3/tutorial/introduction.html#numbers
    https://docs.python.org/3.5/tutorial/introduction.html#numbers
    https://docs.python.org/3.4/tutorial/introduction.html#numbers
    https://docs.python.org/2/tutorial/introduction.html#numbers


These toggle buttons are created dynamically using jQuery by the script at Doc/tools/static/copybutton.js. However, the method .toggle() it used for click event handling has been deprecated since jQuery 1.8 and removed since jQuery 1.9.

    https://api.jquery.com/toggle-event/


Current Python documentation ships with jQuery v1.11.1 and it has a new .toggle() method with totally different behavior, which controls animation and hide the element. Therefore those buttons are invisible and has no effect.

    https://api.jquery.com/toggle/


To achieve the old behavior, one now needs to create this toggle event on one's own. The most popular way to store the toggle state is by jQuery's .data() data storage.

A patch is attached to make the button functional again.

Just FYI, I applied the patch to the zh-hant translation of the documentation and the code output toggle button is back and works as expected.

    https://docs.python.org.tw/3/tutorial/introduction.html#numbers

You can see the result of any other page by changing the URL domain from docs.python.org to docs.python.org.tw

New changeset f0e20d942760 by Ezio Melotti in branch '3.4':
#26246: update copybutton.js after JQuery update.  Patch by Liang-Bo Wang.
https://hg.python.org/cpython/rev/f0e20d942760

New changeset ac175a7af60b by Ezio Melotti in branch '3.5':
#26246: merge with 3.4.
https://hg.python.org/cpython/rev/ac175a7af60b

New changeset 8c0761260d22 by Ezio Melotti in branch 'default':
#26246: merge with 3.5.
https://hg.python.org/cpython/rev/8c0761260d22

New changeset 20b5d153b894 by Ezio Melotti in branch '2.7':
#26246: update copybutton.js after JQuery update.  Patch by Liang-Bo Wang.
https://hg.python.org/cpython/rev/20b5d153b894

I applied the patch -- it should go live the next time the docs are updated.  Thanks for the report and the patch!

Thanks for the merge. 

I pulled the change and checked the result, but I found the patch missing a line to initiate the correct display state when the button was created. That is, it forgot to set `button.data('hidden', 'false');` when adding the button. 

This causes the first click on the button to have no effect. But the following clicks will work.

I filed the new patch to add this line back. I'm so sorry I missed this line :(

New changeset 7444bdd400cd by Berker Peksag in branch '3.4':
Issue #26246: Set initial value of the hidden attr when creating copy button.
https://hg.python.org/cpython/rev/7444bdd400cd

New changeset 256339c28d42 by Berker Peksag in branch '3.5':
Issue #26246: Set initial value of the hidden attr when creating copy button.
https://hg.python.org/cpython/rev/256339c28d42

New changeset 3e897eef0fac by Berker Peksag in branch 'default':
Issue #26246: Set initial value of the hidden attr when creating copy button.
https://hg.python.org/cpython/rev/3e897eef0fac

New changeset 305ae007899b by Berker Peksag in branch '2.7':
Issue #26246: Set initial value of the hidden attr when creating copy button.
https://hg.python.org/cpython/rev/305ae007899b

Good catch, thanks!

Thanks both for spotting the bug and fixing it!