如何将pip升级到最新?
我安装了pip get-pip.py之后pip freeze抛出以下错误 Exception: Traceback (most recent call last): File "/usr/lib/python2.7/dist-packages/pip/basecommand.py", line 122, in main status = self.run(options, args) File "/usr/lib/python2.7/dist-packages/pip/commands/freeze.py", line 74, in run req = pip.FrozenRequirement.from_dist(dist, dependency_links, find_tags=find_tags) File "/usr/lib/python2.7/dist-packages/pip/__init__.py", line 299, in from_dist assert len(specs) == 1 and specs[0][0] == '==' AssertionError Storing debug log for failure …