On Thu, Oct 13, 2016 at 7:27 AM, Arthur Goldberg <artgoldb...@gmail.com> wrote: > Hi > > We're building utilities to create portable test environments on a > continuous integration and delivery platform (CircleCI). We want our > packages to run on Python 2 and 3 (2.7 and 3.5, currently). We've developed > build utilities that creates these environments, runs tests, and then saves > the results. > We use pip to create environments from requirements.txt files in the > packages. But I'm finding it tricky to use pip and obtain good error > handling. For example, this approach > > with open('requirements.txt', 'r') as file: > reqs = [line.rstrip() for line in file.readlines()] > pip.main(['install'] + reqs) > > raises exceptions for lines in requirements.txt that just contain comments. > Is there a recommended way to use pip, especially pip install, from within a > program and obtain good error handling?
I think the only supported option is subprocess.run(["pip", "install", "-r", "requirements.txt"]) though I suppose you could try passing that to pip.main as well. -n -- Nathaniel J. Smith -- https://vorpus.org