On 2016-12-08 16:53:16 -0600 (-0600), Jason Johnson wrote: [...] > Further reading: > https://pip.pypa.io/en/stable/user_guide/#constraints-files Probably comes as no surprise, but Robert implemented that feature for pip specifically because we (the OpenStack community) had been struggling with this issue for so many years and needed a sane workaround to the lack of intelligent dependency resolution. -- Jeremy Stanley