python - Upgrading to latest pip caused ValueError -
the latest upgrade pip (using python 3.5) causes following error occur pip command: traceback (most recent call last): file "/library/frameworks/python.framework/versions/3.5/bin/pip3.5", line 7, in <module> pip import main file "/library/frameworks/python.framework/versions/3.5/lib/python3.5/site-packages/pip/__init__.py", line 15, in <module> pip.vcs import git, mercurial, subversion, bazaar # noqa file "/library/frameworks/python.framework/versions/3.5/lib/python3.5/site-packages/pip/vcs/subversion.py", line 9, in <module> pip.index import link file "/library/frameworks/python.framework/versions/3.5/lib/python3.5/site-packages/pip/index.py", line 29, in <module> pip.wheel import wheel, wheel_ext file "/library/frameworks/python.framework/versions/3.5/lib/python3.5/site-packages/pip/wheel.py", line 32, in <module> pip import pep425tags file "/library/framework...