Use "six" to abstract dictionary iteration and callable for python 2/3

Review Request #4895 — Created Nov. 4, 2013 and submitted

david
Review Board
master
reviewboard

Use "six" to abstract dictionary iteration and callable for python 2/3

I'm starting to work on porting our codebase to be compatible with both python
2 and 3. In python 3, items(), keys(), and values() are all iterators by
default and the old iter*() methods are gone. The "six" library includes
abstractions to handle these.

In addition, for some strange reason 'callable' is gone in python 3.0 and 3.1.
They brought it back in 3.2 (which may be a reasonable minimum), but for now,
to get the 2to3 tool to shut up, I'm using six's abstraction for that as well.

Ran unit tests.

Description From Last Updated

I think len() will still do the right thing here, without converting to a list.

chipx86chipx86

Same comment about len().

chipx86chipx86

Is this still needed?

chipx86chipx86
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