pip3错误-“\u NamespacePath”对象没有属性“sort”

Question

我试图通过pip3安装一个软件包，但出现了这个错误。我运行的每个pip/pip3命令都会给出这个错误-

alexg@hitbox:~$ pip3 -V
Traceback (most recent call last):
  File "/usr/local/bin/pip3", line 7, in <module>
    from pip import main
  File "/home/alexg/.local/lib/python3.5/site-packages/pip/__init__.py", line 26, in <module>
    from pip.utils import get_installed_distributions, get_prog
  File "/home/alexg/.local/lib/python3.5/site-packages/pip/utils/__init__.py", line 27, in <module>
    from pip._vendor import pkg_resources
  File "/home/alexg/.local/lib/python3.5/site-packages/pip/_vendor/pkg_resources/__init__.py", line 3018, in <module>
    @_call_aside
  File "/home/alexg/.local/lib/python3.5/site-packages/pip/_vendor/pkg_resources/__init__.py", line 3004, in _call_aside
    f(*args, **kwargs)
  File "/home/alexg/.local/lib/python3.5/site-packages/pip/_vendor/pkg_resources/__init__.py", line 3046, in _initialize_master_working_set
    dist.activate(replace=False)
  File "/home/alexg/.local/lib/python3.5/site-packages/pip/_vendor/pkg_resources/__init__.py", line 2578, in activate
    declare_namespace(pkg)
  File "/home/alexg/.local/lib/python3.5/site-packages/pip/_vendor/pkg_resources/__init__.py", line 2152, in declare_namespace
    _handle_ns(packageName, path_item)
  File "/home/alexg/.local/lib/python3.5/site-packages/pip/_vendor/pkg_resources/__init__.py", line 2092, in _handle_ns
    _rebuild_mod_path(path, packageName, module)
  File "/home/alexg/.local/lib/python3.5/site-packages/pip/_vendor/pkg_resources/__init__.py", line 2121, in _rebuild_mod_path
    orig_path.sort(key=position_in_sys_path)
AttributeError: '_NamespacePath' object has no attribute 'sort'

我试过运行pip3安装--根据一些答案升级pip setuptools，但每个pip命令都会给我错误。我被困住了，什么也做不了。

是什么原因造成的，如何修复？

我使用的是Ubuntu16.04和Python3.5。2

Answer 1

这听起来可能很奇怪，因为我遇到了这个问题，我尝试了SO和GitHub问题中提到的所有内容。但后来我用easyinstall安装了pip，并且pip命令正在工作。也许现在有2个pip包了。但错误已经消失了。

简易安装pip

Answer 2

升级setupols为我工作：

pip3 install --upgrade setuptools

Answer 3

我在Python3.5中遇到了同样的问题。2和pip3（9.0.1）。我通过以下解决方法解决了这个问题：https://github.com/pypa/setuptools/issues/885#issuecomment-307696027

更具体地说，我编辑了这个文件的第#2121~2122行："sudo vim /usr/local/lib/python3.5/dist-packages/pip/_vendor/pkg_resources/__init__.py"

#orig_path.sort(key=position_in_sys_path)
#module.__path__[:] = [_normalize_cached(p) for p in orig_path]
orig_path_t = list(orig_path)
orig_path_t.sort(key=position_in_sys_path)
module.__path__[:] = [_normalize_cached(p) for p in orig_path_t]