The devel tracker has support for displaying and tracking patches.
However a lot of it is commented out.

Needs somebody who knows how this should work to fix it.

Maybe some of the python.org folks know??

It looks like that template may indeed have been branched off our code
base at some point.  It isn't obvious to me what you mean by "a lot
of it is commented out", though.  What part of the code are you looking
at?  (I didn't spend a lot of time scanning it.)

In message <20160710160515.6997DB1415A@webabinitio.net>,
R David Murray writes:
>It looks like that template may indeed have been branched off our code
>base at some point.  It isn't obvious to me what you mean by "a lot
>of it is commented out", though.  What part of the code are you looking
>at?  (I didn't spend a lot of time scanning it.)

If you look at:

   share/roundup/templates/devel/html/bug.item.html

the patch code is all commented out:

<!--
<tr tal:condition="context/is_edit_ok">
 <th><tal:block i18n:translate="">Patch</tal:block>:</th>
 <td colspan="3">
...
 <th><tal:block i18n:translate="">Repo. Revision</tal:block>:</th>
 <td colspan=3><input type="edit" name="patches-1@revision" size="40"></td>
</tr>
-->

I am not sure if there are other similar templates.

Thanks for looking at this for me.

Hmm.  Looks like the template has different IssueClasses for different
things...we only have the one IssueClass, just like the classic template.
The fields in the bugs template sound kind of like our extra fields,
but the two templates are not similar enough to be informative.
Whatever origins of the code I don't think knowledge of the Python
tacker is going to help sorting out what this code is trying to do.