当我今天尝试打开终端强制更新 Firefox 时，终端中出现了以下消息：
bash: /usr/local/bin/powerline-shell: /usr/bin/python: bad interpreter: No such file or directory
Ubuntu ver 22.04 lts 64 bit
现在尝试重新安装 Python 3 后，出现了以下情况
sudo apt install --reinstall python-is-python3
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 3 not upgraded.
Need to get 2,788 B of archives.
After this operation, 0 B of additional disk space will be used.
Get:1 http://us.archive.ubuntu.com/ubuntu jammy/main amd64 python-is-python3 all 3.9.2-2 [2,788 B]
Fetched 2,788 B in 1s (4,161 B/s)
(Reading database ... 420664 files and directories currently installed.)
Preparing to unpack .../python-is-python3_3.9.2-2_all.deb ...
Unpacking python-is-python3 (3.9.2-2) over (3.9.2-2) ...
Setting up python-is-python3 (3.9.2-2) ...
Processing triggers for man-db (2.10.2-1) ...
/usr/lib/python3/dist-packages/pkg_resources/__init__.py:116: PkgResourcesDeprecationWarning: 1.16.0-unknown is an invalid version and will not be supported in a future release
warnings.warn(
/usr/lib/python3/dist-packages/pkg_resources/__init__.py:116: PkgResourcesDeprecationWarning: 0.1.43ubuntu1 is an invalid version and will not be supported in a future release
warnings.warn(
/usr/lib/python3/dist-packages/pkg_resources/__init__.py:116: PkgResourcesDeprecationWarning: 1.1build1 is an invalid version and will not be supported in a future release
warnings.warn(
Traceback (most recent call last):
File "/usr/local/bin/powerline-shell", line 6, in <module>
from pkg_resources import load_entry_point
File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 3267, in <module>
def _initialize_master_working_set():
File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 3241, in _call_aside
f(*args, **kwargs)
File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 3279, in _initialize_master_working_set
working_set = WorkingSet._build_master()
File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 573, in _build_master
ws.require(__requires__)
File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 891, in require
needed = self.resolve(parse_requirements(requirements))
File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 777, in resolve
raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'powerline-shell==0.7.0' distribution was not found and is required by the application
当我关闭并重新打开终端时，显示的内容如下：
/usr/lib/python3/dist-packages/pkg_resources/__init__.py:116: PkgResourcesDeprecationWarning: 1.16.0-unknown is an invalid version and will not be supported in a future release
warnings.warn(
/usr/lib/python3/dist-packages/pkg_resources/__init__.py:116: PkgResourcesDeprecationWarning: 0.1.43ubuntu1 is an invalid version and will not be supported in a future release
warnings.warn(
/usr/lib/python3/dist-packages/pkg_resources/__init__.py:116: PkgResourcesDeprecationWarning: 1.1build1 is an invalid version and will not be supported in a future release
warnings.warn(
Traceback (most recent call last):
File "/usr/local/bin/powerline-shell", line 6, in <module>
from pkg_resources import load_entry_point
File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 3267, in <module>
def _initialize_master_working_set():
File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 3241, in _call_aside
f(*args, **kwargs)
File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 3279, in _initialize_master_working_set
working_set = WorkingSet._build_master()
File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 573, in _build_master
ws.require(__requires__)
File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 891, in require
needed = self.resolve(parse_requirements(requirements))
File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 777, in resolve
raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'powerline-shell==0.7.0' distribution was not found and is required by the application
答案1
/usr/bin/python通过链接到运行以下命令来修复该问题/usr/bin/python3：
sudo apt update
sudo apt install python-is-python3
解释：
旧版本的 Ubuntu 使用 Python2 作为默认版本。传统上，/usr/bin/python链接到Python3/usr/bin/python2并且大多数脚本明确/usr/bin/python3为 Python3 运行。几年前，在过渡到 Python3 之后，他们将此选项留给用户以实现向后兼容性。
在过渡后的早期版本中，有两个选项：python-is-python2和python-is-python3。安装其中一个软件包都会将其各自的 Python 版本链接到/usr/bin/python。同样，这是为了确保向后兼容性。从那时起，Python2 已经变得有些过时，现在似乎python-is-python3是唯一可用的选项。如果没有此软件包，则没有符号链接，/usr/bin/python除非您手动创建一个。
看这个相关问题了解更多信息。
编辑：
因此，看起来您有几个选项可以解决这个问题。
首先，运行以下命令尝试卸载 powerline-shell：
sudo pip uninstall powerline-shell
如果有效，请运行以下一系列命令在本地安装它：
/usr/bin/pip3 install --upgrade pip
现在，注销并重新登录并运行以下命令：
pip install powerline-shell
powerline-shell如果打开终端后问题仍然存在，请运行以下命令：
pip uninstall powerline-shell
git clone https://github.com/b-ryan/powerline-shell
cd powerline-shell
python setup.py install