Now that Stretch development is winding down, and I've been doing some recent maintenance on pip, I wanted to throw this out there and see if anybody has strong opinions one way or the other.
I'm considering sticking with pip 8.1.2 for Stretch, even though upstream is at 9.0.1. Here's the changelog: https://pip.pypa.io/en/stable/news/ Note the backward incompatibility introduced in 9.0.0, though Donald tells me that it's not a common use case so unlikely to be a problem. pip 9 will be the default version in Python 3.6, but that probably doesn't really matter for us since python3.6 is in experimental. pip 9 does include a feature that makes it easier for upstreams to drop Python 2, by allowing them to specify a requires-python parameter. There's some better automation features and a few other things. See the changelog linked above for details. I have not started to look at what if anything needs to be done to transition to pip 9, but if you have a strong opinion one way or the other, please weigh in. Cheers, -Barry
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