我最近安装了Ubuntu 19.04，默认情况下具有Python 3.7。我需要处理多个使用Python 3.6的项目。
是否可以将其安装在 Disco Dingo 上？
我尝试了哪个可以在16.04上使用
milano@milano-desktop:~$ sudo add-apt-repository ppa:jonathonf/python-3.6
...
milano@milano-desktop:~$ sudo apt-get install python3.6
Reading package lists... Done
Building dependency tree
Reading state information... Done
Note, selecting 'python3.6-2to3' for regex 'python3.6'
Note, selecting 'libpython3.6-stdlib' for regex 'python3.6'
The following packages were automatically installed and are no longer required:
fonts-liberation2 fonts-opensymbol gir1.2-geocodeglib-1.0
gir1.2-gst-plugins-base-1.0 gir1.2-gstreamer-1.0 gir1.2-gudev-1.0
gir1.2-udisks-2.0 grilo-plugins-0.3-base gstreamer1.0-gtk3 guile-2.2-libs
libboost-date-time1.67.0 libboost-filesystem1.67.0 libboost-iostreams1.67.0
libboost-locale1.67.0 libcdr-0.1-1 libclucene-contribs1v5 libclucene-core1v5
libcmis-0.5-5v5 libcolamd2 libcurl4 libdazzle-1.0-0 libe-book-0.1-1 libeot0
libepubgen-0.1-1 libetonyek-0.1-1 libevent-2.1-6 libfreerdp-client2-2
libfreerdp2-2 libgc1c2 libgee-0.8-2 libgom-1.0-0 libgpgmepp6 libgpod-common
libgpod4 liblangtag-common liblangtag1 liblirc-client0 liblua5.3-0
libmediaart-2.0-0 libminiupnpc17 libmspub-0.1-1 libodfgen-0.1-1
liborcus-0.14-0 libqqwing2v5 libraw19 librevenge-0.0-0 libsgutils2-2
libsuitesparseconfig5 libvncclient1 libwinpr2-2 libxmlsec1 libxmlsec1-nss
lp-solve media-player-info python3-mako python3-markupsafe syslinux
syslinux-common syslinux-legacy usb-creator-common
Use 'sudo apt autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
milano@milano-desktop:~$ python3.6
Command 'python3.6' not found, did you mean:
command 'python3.8' from deb python3.8-minimal (3.8.0~a3-2)
command 'python3.7' from deb python3.7-minimal (3.7.3-2)
Try: sudo apt install <deb name>
python3 +选项卡
milano@milano-desktop:~$ python3
python3 python3.7 python3.7m python3m
死因
milano@milano-desktop:~$ sudo add-apt-repository ppa:deadsnakes/ppa
This PPA contains more recent Python versions packaged for Ubuntu.
Disclaimer: there's no guarantee of timely updates in case of security problems or other issues. If you want to use them in a security-or-otherwise-critical environment (say, on a production server), you do so at your own risk.
Update Note
===========
Please use this repository instead of ppa:fkrull/deadsnakes.
Reporting Issues
================
Issues can be reported in the master issue tracker at:
https://github.com/deadsnakes/issues/issues
Supported Ubuntu and Python Versions
====================================
Python 3.6 - Ubuntu 14.04, Ubuntu 16.04
For Ubuntu up to 18.04, there's also packages for old Python versions from 2.3 to 3.4.
The packages may also work on other versions of Ubuntu or Debian, but that is not tested or supported.
Third-Party Python Modules
==========================
Python modules in the official Ubuntu repositories are packaged to work with the Python interpreters from the official repositories. Accordingly, they generally won't work with the Python interpreters from this PPA. As an exception, pure-Python modules for Python 3 will work, but any compiled extension modules won't.
To install 3rd-party Python modules, you should use the common Python packaging tools. For an introduction into the Python packaging ecosystem and its tools, refer to the Python Packaging User Guide:
https://packaging.python.org/installing/
Sources
=======
The package sources are available at:
https://github.com/deadsnakes/
More info: https://launchpad.net/~deadsnakes/+archive/ubuntu/ppa
Press [ENTER] to continue or Ctrl-c to cancel adding it.
Hit:1 http://cz.archive.ubuntu.com/ubuntu disco InRelease
Ign:2 http://ppa.launchpad.net/deadsnakes/ppa/ubuntu disco InRelease
Get:3 http://cz.archive.ubuntu.com/ubuntu disco-updates InRelease [88,4 kB]
Hit:4 http://security.ubuntu.com/ubuntu disco-security InRelease
Hit:5 http://cz.archive.ubuntu.com/ubuntu disco-backports InRelease
Ign:6 http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu disco InRelease
Err:7 http://ppa.launchpad.net/deadsnakes/ppa/ubuntu disco Release
404 Not Found [IP: 91.189.95.83 80]
Err:8 http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu disco Release
404 Not Found [IP: 91.189.95.83 80]
Reading package lists... Done
E: The repository 'http://ppa.launchpad.net/deadsnakes/ppa/ubuntu disco Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu disco Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
答案 0 :(得分：7)
是的，就像@furas所说的那样，您可以下载python 3.6.8或3.6.7的源代码（如果需要其他格式，这些是.xz源文件的直接链接，请访问3.6.8或3.6.7）
这些是源README.rst文件中的一些内容
Build Instructions
------------------
On Unix, Linux, BSD, macOS, and Cygwin::
./configure
make
make test
sudo make install
This will install Python as python3.
如果您要在系统中将python3.6安装为python3.6（而非python3），请参见README.rst文件中的其他指南
For example, if you want to install Python 2.7, 3.5, and 3.6 with 3.6 being the
primary version, you would execute ``make install`` in your 3.6 build directory
and ``make altinstall`` in the others.
谢谢...
答案 1 :(得分：1)
不必从源代码进行编译，只需手动下载并安装具有依赖项的deb-packages python 3.6：
wget http://archive.ubuntu.com/ubuntu/pool/main/p/python3.6/libpython3.6-minimal_3.6.7-1~18.10_amd64.deb
dpkg -i libpython3.6-minimal_3.6.7-1~18.10_amd64.deb
wget http://archive.ubuntu.com/ubuntu/pool/main/p/python3.6/libpython3.6-stdlib_3.6.7-1~18.10_amd64.deb
dpkg -i libpython3.6-stdlib_3.6.7-1~18.10_amd64.deb
wget http://archive.ubuntu.com/ubuntu/pool/main/p/python3.6/python3.6-minimal_3.6.7-1~18.10_amd64.deb
dpkg -i python3.6-minimal_3.6.7-1~18.10_amd64.deb
wget http://archive.ubuntu.com/ubuntu/pool/main/p/python3.6/python3.6_3.6.7-1~18.10_amd64.deb
dpkg -i python3.6_3.6.7-1~18.10_amd64.deb
这足以运行python 3.6。但是，某些模块可能无法工作，例如pycurl ，结果我没有找到解决方案。 尝试导入时发生 ModuleNotFoundError ，尝试安装pycurl时发生 ImportError 错误：无法导入名称'sysconfig' ，因为python3- distutils软件包是从3.7版安装的，并且不兼容。 从3.6版开始的手动安装打破了3.7版的依赖关系，在任何情况下apt都将尝试对其进行修复。
答案 2 :(得分：0)
不要在您的系统中乱搞。
Ubuntu 19.04作为给定标准的Python 3.7，因此，如果要使用Python 3.6。*，则应安装conda并使用特定的Python版本创建环境：
conda create --name py36 -c conda-forge python=3.6.* pip
确保您还可以创建其他虚拟环境并使用pip。
或者您可以去docker。
如果您真的想在操作系统上更改版本，那么我建议使用NixOS。