折腾：
【未解决】Ubuntu中升级Python 3.5到最新版的Python 3.7
期间，Ubuntu中尝试去安装Python3.7：
sudo apt-get install python3.7
结果报错：
Ubuntu E: Unable to locate package python3.7
参考之前的：
说的：
sudo apt update sudo apt install software-properties-common sudo add-apt-repository ppa:deadsnakes/ppa sudo apt update sudo apt install python3.7
去试试：
sudo add-apt-repository ppa:deadsnakes/ppa
详细log：
# 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: Supported Ubuntu and Python Versions ==================================== - Ubuntu 16.04 (xenial) Python 2.3 - Python 2.6, Python 3.1 - Python3.4, Python 3.6 - Python3.8 - Ubuntu 18.04 (bionic) Python2.3 - Python 2.6, Python 3.1 - Python 3.5, Python3.7 - Python3.8 - Note: Python2.7 (both), Python 3.5 (xenial), Python 3.6 (bionic) are not provided by deadsnakes as upstream ubuntu provides those packages. 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: Sources ======= The package sources are available at: More info: https://launchpad.net/~deadsnakes/+archive/ubuntu/ppa Press [ENTER] to continue or ctrl-c to cancel adding it gpg: keyring `/tmp/tmp31o_ak4_/secring.gpg' created gpg: keyring `/tmp/tmp31o_ak4_/pubring.gpg' created gpg: requesting key 6A755776 from hkp server keyserver.ubuntu.com gpg: /tmp/tmp31o_ak4_/trustdb.gpg: trustdb created gpg: key 6A755776: public key "Launchpad PPA for deadsnakes" imported gpg: Total number processed: 1 gpg: imported: 1 (RSA: 1) OK
然后再去试试：
sudo apt-get update sudo apt-get install python3.7
详细log
# sudo apt-get update Hit:1 http://mirrors.tencentyun.com/ubuntu xenial InRelease Hit:2 http://mirrors.tencentyun.com/ubuntu xenial-security InRelease Hit:3 http://mirrors.tencentyun.com/ubuntu xenial-updates InRelease Get:4 http://ppa.launchpad.net/deadsnakes/ppa/ubuntu xenial InRelease [18.0 kB] Hit:5 http://nginx.org/packages/ubuntu xenial InRelease Hit:6 http://ppa.launchpad.net/ondrej/php/ubuntu xenial InRelease Hit:7 http://ppa.launchpad.net/webupd8team/y-ppa-manager/ubuntu xenial InRelease Get:8 http://ppa.launchpad.net/deadsnakes/ppa/ubuntu xenial/main amd64 Packages [27.9 kB] Get:9 http://ppa.launchpad.net/deadsnakes/ppa/ubuntu xenial/main i386 Packages [27.9 kB] Fetched 80.4 kB in 7s (11.5 kB/s) Reading package lists... Done
就可以了：
# sudo apt-get install python3.7 Reading package lists... Done Building dependency tree Reading state information... Done The following additional packages will be installed: libpython3.7-minimal libpython3.7-stdlib python3.7-distutils python3.7-lib2to3 python3.7-minimal Suggested packages: python3.7-venv python3.7-doc binfmt-support The following NEW packages will be installed: libpython3.7-minimal libpython3.7-stdlib python3.7 python3.7-distutils python3.7-lib2to3 python3.7-minimal 0 upgraded, 6 newly installed, 0 to remove and 432 not upgraded. 2 not fully installed or removed. Need to get 4,814 kB of archives. After this operation, 24.2 MB of additional disk space will be used. Do you want to continue? [Y/n] y Get:1 http://ppa.launchpad.net/deadsnakes/ppa/ubuntu xenial/main amd64 libpython3.7-minimal amd64 3.7.3-1+xenial1 [595 kB] 6% [1 libpython3.7-minimal 344 kB/595 kB 58%]
【总结】
此处Ubuntu中
sudo apt-get install python3.7
会报错：
Ubuntu E: Unable to locate package python3.7
原因：apt默认的源中没有Python3.7
解决办法：
加上有Python 3.7的源：
sudo add-apt-repository ppa:deadsnakes/ppa
再去更新一下：
sudo apt-get update
再去安装：
sudo apt-get install python3.7
即可。
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