小编Raj*_*mon的帖子

我使用 安装了 pip get-pip.py，但pip freeze执行后出现以下错误：

    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 in /home/simon/.pip/pip.log

我已经检查过 pip 1.7 版是最新的。但是，通过更新 pippip install -U pip并没有更新我的 pip。我该如何解决这个问题？

    simon@simon-OptiPlex-780:~/Nightybuild$ pip --version
    pip 1.5.6 from /usr/lib/python2.7/dist-packages (python 2.7)
    simon@simon-OptiPlex-780:~/Nightybuild$ pip --version …

我决定升级

sudo update-manager -d

然后它打开更新管理器 GUI。单击升级按钮后，返回以下错误列表：

W:There is no public key available for the following key IDs: 3B4FE6ACC0B21F32,
W:There is no public key available for the following key IDs: 3B4FE6ACC0B21F32,
E:Some index files failed to download. They have been ignored, or old ones used instead.

如何解决这个问题？