python-pip 在 Arch Linux 上似乎被破坏了（没有名为“pip._vendor.retrying”的模块）

Question

系统更新后，我在尝试调用pip(或pip3.7或pip3) 时收到此错误：

  $ pip3.7
Traceback (most recent call last):
  File "/usr/bin/pip3.7", line 11, in <module>
    load_entry_point('pip==19.0.3', 'console_scripts', 'pip3.7')()
  File "/usr/lib/python3.7/site-packages/pkg_resources/__init__.py", line 489, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "/usr/lib/python3.7/site-packages/pkg_resources/__init__.py", line 2843, in load_entry_point
    return ep.load()
  File "/usr/lib/python3.7/site-packages/pkg_resources/__init__.py", line 2434, in load
    return self.resolve()
  File "/usr/lib/python3.7/site-packages/pkg_resources/__init__.py", line 2440, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/lib/python3.7/site-packages/pip/_internal/__init__.py", line 40, in <module>
    from pip._internal.cli.autocompletion import autocomplete
  File "/usr/lib/python3.7/site-packages/pip/_internal/cli/autocompletion.py", line 8, in <module>
    from pip._internal.cli.main_parser import create_main_parser
  File "/usr/lib/python3.7/site-packages/pip/_internal/cli/main_parser.py", line 8, in <module>
    from pip._internal.cli import cmdoptions
  File "/usr/lib/python3.7/site-packages/pip/_internal/cli/cmdoptions.py", line 22, in <module>
    from pip._internal.utils.hashes import STRONG_HASHES
  File "/usr/lib/python3.7/site-packages/pip/_internal/utils/hashes.py", line 10, in <module>
    from pip._internal.utils.misc import read_chunks
  File "/usr/lib/python3.7/site-packages/pip/_internal/utils/misc.py", line 24, in <module>
    from pip._vendor.retrying import retry  # type: ignore
ModuleNotFoundError: No module named 'pip._vendor.retrying'

相关目录似乎存在并且由正确的包拥有

  $ ls /usr/lib/python3.7/site-packages/pip/_vendor
__init__.py  __pycache__
  $ sudo pacman -Qo /usr/lib/python3.7/site-packages/pip/_vendor
/usr/lib/python3.7/site-packages/pip/_vendor/ is owned by python-pip 19.0.3-1

卸载重装没有什么区别

  $ sudo pacman -Rv --noconfirm python-pip
Root      : /
Conf File : /etc/pacman.conf
DB Path   : /var/lib/pacman/
Cache Dirs: /var/cache/pacman/pkg/  
Hook Dirs : /usr/share/libalpm/hooks/  /etc/pacman.d/hooks/  
Lock File : /var/lib/pacman/db.lck
Log File  : /var/log/pacman.log
GPG Dir   : /etc/pacman.d/gnupg/
Targets   : python-pip
checking dependencies...
:: python optionally requires python-pip

Packages (1) python-pip-19.0.3-1

Total Removed Size:  1.06 MiB

:: Do you want to remove these packages? [Y/n] 
:: Processing package changes...
(1/1) removing python-pip                                                                                                                      [########################################################################################] 100%
:: Running post-transaction hooks...
(1/1) Arming ConditionNeedsUpdate...
  $ sudo pacman -Qo /usr/lib/python3.7/site-packages/pip/_vendor
error: No package owns /usr/lib/python3.7/site-packages/pip/_vendor
  $ ls /usr/lib/python3.7/site-packages/pip/_vendor
ls: cannot access '/usr/lib/python3.7/site-packages/pip/_vendor': No such file or directory
  $ ls /usr/lib/python3.7/site-packages/pip
ls: cannot access '/usr/lib/python3.7/site-packages/pip': No such file or directory
  $ pip3.7
bash: /usr/bin/pip3.7: No such file or directory
  $ sudo pacman -Sv --noconfirm python-pip
Root      : /
Conf File : /etc/pacman.conf
DB Path   : /var/lib/pacman/
Cache Dirs: /var/cache/pacman/pkg/  
Hook Dirs : /usr/share/libalpm/hooks/  /etc/pacman.d/hooks/  
Lock File : /var/lib/pacman/db.lck
Log File  : /var/log/pacman.log
GPG Dir   : /etc/pacman.d/gnupg/
Targets   : python-pip
resolving dependencies...
looking for conflicting packages...

Packages (1) python-pip-19.0.3-1

Total Installed Size:  1.06 MiB

:: Proceed with installation? [Y/n] 
(1/1) checking keys in keyring                                                                                                                 [########################################################################################] 100%
(1/1) checking package integrity                                                                                                               [########################################################################################] 100%
(1/1) loading package files                                                                                                                    [########################################################################################] 100%
(1/1) checking for file conflicts                                                                                                              [########################################################################################] 100%
(1/1) checking available disk space                                                                                                            [########################################################################################] 100%
:: Processing package changes...
(1/1) installing python-pip                                                                                                                    [########################################################################################] 100%
:: Running post-transaction hooks...
(1/1) Arming ConditionNeedsUpdate...
  $ sudo pacman -Qo /usr/lib/python3.7/site-packages/pip/_vendor
/usr/lib/python3.7/site-packages/pip/_vendor/ is owned by python-pip 19.0.3-1
  $ ls /usr/lib/python3.7/site-packages/pip/_vendor
__init__.py  __pycache__
  $ pip3.7
Traceback (most recent call last):
  File "/usr/bin/pip3.7", line 11, in <module>
    load_entry_point('pip==19.0.3', 'console_scripts', 'pip3.7')()
  File "/usr/lib/python3.7/site-packages/pkg_resources/__init__.py", line 489, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "/usr/lib/python3.7/site-packages/pkg_resources/__init__.py", line 2843, in load_entry_point
    return ep.load()
  File "/usr/lib/python3.7/site-packages/pkg_resources/__init__.py", line 2434, in load
    return self.resolve()
  File "/usr/lib/python3.7/site-packages/pkg_resources/__init__.py", line 2440, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/lib/python3.7/site-packages/pip/_internal/__init__.py", line 40, in <module>
    from pip._internal.cli.autocompletion import autocomplete
  File "/usr/lib/python3.7/site-packages/pip/_internal/cli/autocompletion.py", line 8, in <module>
    from pip._internal.cli.main_parser import create_main_parser
  File "/usr/lib/python3.7/site-packages/pip/_internal/cli/main_parser.py", line 8, in <module>
    from pip._internal.cli import cmdoptions
  File "/usr/lib/python3.7/site-packages/pip/_internal/cli/cmdoptions.py", line 22, in <module>
    from pip._internal.utils.hashes import STRONG_HASHES
  File "/usr/lib/python3.7/site-packages/pip/_internal/utils/hashes.py", line 10, in <module>
    from pip._internal.utils.misc import read_chunks
  File "/usr/lib/python3.7/site-packages/pip/_internal/utils/misc.py", line 24, in <module>
    from pip._vendor.retrying import retry  # type: ignore
ModuleNotFoundError: No module named 'pip._vendor.retrying'

其他建议的解决方案包括

• ssl 与此相关，但python3 -c "import ssl"运行没有问题

• python-requests可能会丢失，但它就在那里。卸载和重新安装没有什么区别。

• python-setuptools可能会丢失，但它就在那里。卸载和重新安装没有什么区别。

• pip uninstall pkg-resources==0.0.0，但这当然会失败，因为 pip 没有启动

• 从 重新安装pip 我没有尝试。我宁愿不这样做，因为我认为这会以某种方式导致依赖噩梦curl -sS https://bootstrap.pypa.io/get-pip.py | sudo python3

值得注意的是，我曾经使用过不同的 python 3 版本。我必须暂时从 AUR 安装 3.6，因为我必须使用不适用于 3.7 的软件。但 3.6 现在已经消失了，只剩下标准的 3.7。

系统是Arch Linux 5.2.1，python是3.7.3。

Answer 1

您可以尝试pip直接从python( 或python3) 重新安装损坏的文件，而不是使用系统包管理器 ( pacman)。请注意 Arch Linux，但对我来说它解决了ModuleNotFoundError: No module named 'pip._vendor.retrying'Ubuntu 16.04 上的类似问题 ( )：

$ sudo python -m pip install --upgrade pip