I tried bisecting the upstream code directly from git, and got down to the range of commits where upstream removed bundled libraries:
With requests 282b01a7c9, awscli works (v2.15.1, right before deleting the 'packages' directory) With requests 47f170bb35, awscli fails (pre-v2.16.0, right after fixing the last "from .packages.urllib3.foo import Bar") The in-between revisions don't work (ImportError: No module named 'requests.packages.urllib3.exceptions'), because the 'packages' directory was already deleted but import statements still pointed to it. Note that upstream's 47f170bb35 uses the system urllib3, but fails with both python3-urllib3 1.19.1-1 and 1.21.1-1. I guess this is bad news for trying to figure out what causes the problem... -- Nicolás
