QueryDict docs don't mention that iter methods are available only on Python 2

[Tzu-ping Chung]

The documentation does not make distinctions between Python 2 and 3 APIs, and lists both iter- and non-iter- methods. This gives an impression that both names are available for all Python versions, while in fact Python 3 does not have the iterator-based methods under iter- names. While the rule makes sense (being consistent with core Python), it should be made clear in documentation.

[Tim Graham]

Is the attached patch sufficient?

[Tzu-ping Chung]

I think it’s useful to document at least lists() to mention it behaves differently on Python 2 and 3. It would be nice if there are refs in iter- methods to non-iter- methods and vice versa, but that might be just me thinking too much.

[Tim Graham]

If you want to submit a patch, I'll take a look, but I don't know if it's worth spending much time on considering that Django will drop Python 2 support in master next month.

[Tzu-ping Chung]

I don't know if it's worth spending much time on considering that Django will drop Python 2 support in master next month.

Ah, good point. The previous patch would be enough then.

[Tim Graham <timograham@…>]

In 7ff301ca:

[1.10.x] Fixed #27592 -- Doc'd that QueryDict iter methods are Python 2 only.

Backport of 2e9fa516fde57fd58405481034a5a08b3746b257 from master

[Tim Graham <timograham@…>]

In 2e9fa51:

Fixed #27592 -- Doc'd that QueryDict iter methods are Python 2 only.