我尝试python3.5从我的Ubuntu 16.04sudo apt-get remove python3通过使用目录中的命令/usr/bin。当我尝试使用再次安装它时sudo apt-get install python3，我收到以下错误：
>> /usr/bin$ sudo apt-get remove python3
>> Reading package lists... Done
Building dependency tree
Reading state information... Done
Package 'python3' is not installed, so not removed
The following packages were automatically installed and are no longer required:
gir1.2-glib-2.0 libexpat1-dev libgirepository-1.0-1 libpython3-dev libpython3.5-dev python-pip-whl python-pycurl python3.5-dev
Use 'sudo apt autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 61 not upgraded.
>> python3 -V
>> bash: /usr/bin/python3: No such file or directory
>> sudo apt-get install python3
>> Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
gir1.2-glib-2.0 libexpat1-dev libgirepository-1.0-1 libpython3-dev libpython3.5-dev python-pip-whl python-pycurl python3.5-dev
Use 'sudo apt autoremove' to remove them.
The following additional packages will be installed:
dh-python
Suggested packages:
python3-doc python3-tk python3-venv
The following NEW packages will be installed:
dh-python python3
0 upgraded, 2 newly installed, 0 to remove and 61 not upgraded.
Need to get 0 B/82.7 kB of archives.
After this operation, 436 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
Selecting previously unselected package dh-python.
(Reading database ... 180938 files and directories currently installed.)
Preparing to unpack .../dh-python_2.20151103ubuntu1.2_all.deb ...
Unpacking dh-python (2.20151103ubuntu1.2) ...
Selecting previously unselected package python3.
Preparing to unpack .../python3_3.5.1-3_amd64.deb ...
Unpacking python3 (3.5.1-3) ...
Processing triggers for man-db (2.7.5-1) ...
Setting up python3 (3.5.1-3) ...
running python rtupdate hooks for python3.5...
/usr/share/python3/runtime.d/dh-python.rtupdate: 5: /usr/share/python3/runtime.d/dh-python.rtupdate: py3clean: not found
error running python rtupdate hook dh-python
dpkg: error processing package python3 (--configure):
subprocess installed post-installation script returned error exit status 4
dpkg: dependency problems prevent configuration of dh-python:
dh-python depends on python3:any (>= 3.3.2-2~); however:
Package python3 is not configured yet.
dpkg: error processing package dh-python (--configure):
dependency problems - leaving unconfigured
Errors were encountered while processing:
python3
dh-python
E: Sub-process /usr/bin/dpkg returned an error code (1)
>> whereis python3
>> python3: /usr/bin/python3.6m /usr/bin/python3.6 /usr/bin/python3.5m /usr/bin/python3 /usr/lib/python3.5 /usr/lib/python3.6 /usr/lib/python3 /etc/python3.5 /etc/python3.6 /etc/python3 /usr/local/lib/python3.5 /usr/local/lib/python3.6 /usr/share/python3 /usr/share/man/man1/python3.1.gz
请提出解决方案。
答案1
如果你想确保软件包被彻底删除，请使用“purge”选项。这也会删除所有配置文件。
sudo apt purge python3
sudo apt-get purge python3
您也可以使用“*”，但这实际上会删除以 python3 开头的所有内容。
sudo apt purge python3*
但正如许多评论中所提到的删除系统 Python 是一个坏主意。 因此，为了更好地控制删除，请检查仍然安装的内容。
dpkg -l | grep -E '*python*' | less
或者，您可以直接在安装目录中查找。
ls /usr/bin/python
这样你就可以检查你安装了哪些 Python 包。如果你想删除它们，还可以查看它们的确切名称。
在我看来，当你运行时：
sudo apt-get install python3
它尝试仅安装“dh-python”包，因为它仍然发现已安装了一些 python 包。它还告诉您 python3 尚未配置。因此看起来它已安装，但由于您之前尝试删除它，配置不正确，因此无法安装“dh-python”。因此，正确删除 python3 包及其配置文件（之前由您安装，而不是由系统安装）应该可以让您正确安装它...
编辑
在删除 Python 之前，请尝试：
sudo dpkg-reconfigure python3*
对于你的情况，它将是：
sudo dpkg-reconfigure python3.5*
如果您决定删除 python。（您安装的版本，而不是系统安装的版本）请务必检查依赖于它的内容。这里你可以看看如何。