当我从 Xterm 运行 gnome-terminal 时，我得到：
文件“/usr/lib/python3/dist-packages/gi/在里面.py”，第 42 行，来自 . import _gi ImportError: 无法从‘gi’导入名称‘_gi’（/usr/lib/python3/dist-packages/gi/在里面.py）
我已经尝试过了：
sudo rm /usr/bin/python3
sudo ln -s python3.5 /usr/bin/python3
sudo apt-get install python3-gi
sudo apt install python3.5
我也重新安装了终端，但什么也没起作用。
Python output:
>> import gi
>> gi.__file__
>> '/usr/lib/python3/dist-packages/gi/__init__.py'
Gnome 终端无法启动 你的 python3 安装已损坏 终端和软件更新在打开时崩溃，与 Python 安装有关
-rwxr-xr-x 1 root root 3452 Jul 19 2017 activate-global-python-argcomplete3
lrwxrwxrwx 1 root root 26 Mar 26 2018 dh_pypy -> ../share/dh-python/dh_pypy
-rwxr-xr-x 1 root root 1056 Apr 16 2018 dh_python2
lrwxrwxrwx 1 root root 29 Mar 26 2018 dh_python3 -> ../share/dh-python/dh_python3
lrwxrwxrwx 1 root root 23 Nov 12 09:31 pdb2.7 -> ../lib/python2.7/pdb.py
lrwxrwxrwx 1 root root 23 Aug 3 20:54 pdb3.5 -> ../lib/python3.5/pdb.py
lrwxrwxrwx 1 root root 23 Oct 22 07:32 pdb3.6 -> ../lib/python3.6/pdb.py
-rwxr-xr-x 1 root root 88224 Dec 17 2017 pvtkpython
lrwxrwxrwx 1 root root 31 Oct 25 07:11 py3versions -> ../share/python3/py3versions.py
lrwxrwxrwx 1 root root 26 Mar 26 2018 pybuild -> ../share/dh-python/pybuild
lrwxrwxrwx 1 root root 18 Dec 30 16:08 python -> /usr/bin/python3.6
lrwxrwxrwx 1 root root 9 Apr 16 2018 python2 -> python2.7
-rwxr-xr-x 1 root root 3670448 Nov 12 09:31 python2.7
lrwxrwxrwx 1 root root 33 Nov 12 09:31 python2.7-config -> x86_64-linux-gnu-python2.7-config
lrwxrwxrwx 1 root root 16 Apr 16 2018 python2-config -> python2.7-config
-rwxr-xr-x 1 root root 365 Aug 22 2016 python2-qr
lrwxrwxrwx 1 root root 18 Dec 30 16:12 python3 -> /usr/bin/python3.5
-rwxr-xr-x 2 root root 4117024 Aug 3 20:54 python3.5
lrwxrwxrwx 1 root root 33 Aug 3 20:54 python3.5-config -> x86_64-linux-gnu-python3.5-config
-rwxr-xr-x 2 root root 4117024 Aug 3 20:54 python3.5m
lrwxrwxrwx 1 root root 34 Aug 3 20:54 python3.5m-config -> x86_64-linux-gnu-python3.5m-config
-rwxr-xr-x 2 root root 4522328 Oct 22 07:32 python3.6
lrwxrwxrwx 1 root root 33 Oct 22 07:32 python3.6-config -> x86_64-linux-gnu-python3.6-config
-rwxr-xr-x 1 root root 401 Feb 21 2018 python3.6-coverage
-rwxr-xr-x 2 root root 4522328 Oct 22 07:32 python3.6m
lrwxrwxrwx 1 root root 34 Oct 22 07:32 python3.6m-config -> x86_64-linux-gnu-python3.6m-config
lrwxrwxrwx 1 root root 16 Oct 25 07:11 python3-config -> python3.6-config
-rwxr-xr-x 1 root root 397 Feb 21 2018 python3-coverage
lrwxrwxrwx 1 root root 10 Oct 25 07:11 python3m -> python3.6m
lrwxrwxrwx 1 root root 17 Oct 25 07:11 python3m-config -> python3.6m-config
-rwxr-xr-x 1 root root 2555 Jul 19 2017 python-argcomplete-check-easy-install-script3
-rwxr-xr-x 1 root root 314 Jul 19 2017 python-argcomplete-tcsh3
lrwxrwxrwx 1 root root 16 Apr 16 2018 python-config -> python2.7-config
lrwxrwxrwx 1 root root 29 Apr 16 2018 pyversions -> ../share/python/pyversions.py
-rwxr-xr-x 1 root root 2665 Jul 19 2017 register-python-argcomplete3
-rwxr-xr-x 1 root root 14424 Dec 17 2017 vtk6python
-rwxr-xr-x 1 root root 2975 Nov 12 09:31 x86_64-linux-gnu-python2.7-config
lrwxrwxrwx 1 root root 34 Aug 3 20:54 x86_64-linux-gnu-python3.5-config -> x86_64-linux-gnu-python3.5m-config
-rwxr-xr-x 1 root root 3246 Aug 3 20:54 x86_64-linux-gnu-python3.5m-config
lrwxrwxrwx 1 root root 34 Oct 22 07:32 x86_64-linux-gnu-python3.6-config -> x86_64-linux-gnu-python3.6m-config
-rwxr-xr-x 1 root root 3283 Oct 22 07:32 x86_64-linux-gnu-python3.6m-config
lrwxrwxrwx 1 root root 33 Oct 25 07:11 x86_64-linux-gnu-python3-config -> x86_64-linux-gnu-python3.6-config
lrwxrwxrwx 1 root root 34 Oct 25 07:11 x86_64-linux-gnu-python3m-config -> x86_64-linux-gnu-python3.6m-config
lrwxrwxrwx 1 root root 33 Apr 16 2018 x86_64-linux-gnu-python-config -> x86_64-linux-gnu-python2.7-config
答案1
在发出上述类似命令之前，请始终记下之前的版本...因此，在发出此命令之前
sudo rm /usr/bin/python3
您应该通过发出以下命令来记录默认版本
python3 --version
在 ubuntu 18.10 上显示
Python 3.6.7
现在你需要调查一下 18.04 标准版正在使用什么，然后把它放回去……在不知道的情况下，你可以通过发出以下命令来查看你的机器上有哪些 python 版本
which python
which python3
可以说类似
python3 is hashed (/usr/bin/python3)
因此进入该目录并按如下方式查看其兄弟目录
cd /usr/bin/
ls -la | grep python
对于我来说，18.10 显示
lrwxrwxrwx 1 root root 26 Jul 23 08:39 dh_pypy -> ../share/dh-python/dh_pypy
-rwxr-xr-x 1 root root 1056 Jun 7 2018 dh_python2
lrwxrwxrwx 1 root root 29 Jul 23 08:39 dh_python3 -> ../share/dh-python/dh_python3
lrwxrwxrwx 1 root root 7 Sep 23 14:14 fail2ban-python -> python3
lrwxrwxrwx 1 root root 23 Oct 2 18:12 pdb2.7 -> ../lib/python2.7/pdb.py
lrwxrwxrwx 1 root root 23 Oct 22 07:32 pdb3.6 -> ../lib/python3.6/pdb.py
lrwxrwxrwx 1 root root 31 Oct 25 07:11 py3versions -> ../share/python3/py3versions.py
-rwxr-xr-x 1 root root 378 Aug 28 16:17 pybabel-python2
lrwxrwxrwx 1 root root 26 Jul 23 08:39 pybuild -> ../share/dh-python/pybuild
lrwxrwxrwx 1 root root 7 Jun 7 2018 python -> python2
lrwxrwxrwx 1 root root 9 Jun 7 2018 python2 -> python2.7
-rwxr-xr-x 1 root root 3690840 Oct 2 18:12 python2.7
lrwxrwxrwx 1 root root 33 Oct 2 18:12 python2.7-config -> x86_64-linux-gnu-python2.7-config
lrwxrwxrwx 1 root root 16 Jun 7 2018 python2-config -> python2.7-config
-rwxr-xr-x 1 root root 154 Sep 20 05:50 python2-pbr
lrwxrwxrwx 1 root root 9 Oct 25 07:11 python3 -> python3.6
-rwxr-xr-x 2 root root 4534680 Oct 22 07:32 python3.6
lrwxrwxrwx 1 root root 33 Oct 22 07:32 python3.6-config -> x86_64-linux-gnu-python3.6-config
-rwxr-xr-x 2 root root 4534680 Oct 22 07:32 python3.6m
lrwxrwxrwx 1 root root 34 Oct 22 07:32 python3.6m-config -> x86_64-linux-gnu-python3.6m-config
lrwxrwxrwx 1 root root 16 Oct 25 07:11 python3-config -> python3.6-config
lrwxrwxrwx 1 root root 10 Oct 25 07:11 python3m -> python3.6m
lrwxrwxrwx 1 root root 17 Oct 25 07:11 python3m-config -> python3.6m-config
lrwxrwxrwx 1 root root 14 Jun 7 2018 python-config -> python2-config
lrwxrwxrwx 1 root root 29 Jun 7 2018 pyversions -> ../share/python/pyversions.py
-rwxr-xr-x 1 root root 2971 Oct 2 18:12 x86_64-linux-gnu-python2.7-config
lrwxrwxrwx 1 root root 33 Jun 7 2018 x86_64-linux-gnu-python2-config -> x86_64-linux-gnu-python2.7-config
lrwxrwxrwx 1 root root 34 Oct 22 07:32 x86_64-linux-gnu-python3.6-config -> x86_64-linux-gnu-python3.6m-config
-rwxr-xr-x 1 root root 3283 Oct 22 07:32 x86_64-linux-gnu-python3.6m-config
lrwxrwxrwx 1 root root 33 Oct 25 07:11 x86_64-linux-gnu-python3-config -> x86_64-linux-gnu-python3.6-config
lrwxrwxrwx 1 root root 34 Oct 25 07:11 x86_64-linux-gnu-python3m-config -> x86_64-linux-gnu-python3.6m-config
lrwxrwxrwx 1 root root 31 Jun 7 2018 x86_64-linux-gnu-python-config -> x86_64-linux-gnu-python2-config
您可能会看到其他 Python 版本......
看起来 18.04 想要 python3 是 3.6.7...所以问题
sudo update-alternatives --config python
它会给你选择 3.6.7 的选项