Ubuntu16.04安装python3.6

Ubuntu16.04系统安装python3.6

Ubuntu16系统自带python2.7和python3.5因为学习需要安装python3.6并把过程记录下来

先检查python版本对应的pip有没有安装

zhonghao@zhonghao:~$pip -V
程序“pip”尚未安装。 您可以使用以下命令安装：
sudo apt install python-pip
zhonghao@zhonghao:~$ sudo apt-get install python-pip
正在读取软件包列表... 完成
正在分析软件包的依赖关系树       
正在读取状态信息... 完成       
将会同时安装下列软件：
  libexpat1-dev libpython-all-dev libpython-dev libpython2.7 libpython2.7-dev
  libpython2.7-minimal libpython2.7-stdlib python-all python-all-dev
  python-dev python-pip-whl python-pkg-resources python-setuptools
  python-wheel python2.7 python2.7-dev python2.7-minimal

python3

zhonghao@zhonghao:~$ sudo apt-get install python3-pip
正在读取软件包列表... 完成
正在分析软件包的依赖关系树       
正在读取状态信息... 完成       
将会同时安装下列软件：
  libpython3-dev libpython3.5 libpython3.5-dev libpython3.5-minimal
  libpython3.5-stdlib python3-dev python3-setuptools python3-wheel python3.5
  python3.5-dev python3.5-minimal
建议安装：
  python-setuptools-doc python3.5-venv python3.5-doc binfmt-support
下列【新】软件包将被安装：
  libpython3-dev libpython3.5-dev python3-dev python3-pip python3-setuptools
  python3-wheel python3.5-dev
下列软件包将被升级：
  libpython3.5 libpython3.5-minimal libpython3.5-stdlib python3.5
  python3.5-minimal

安装python3.6

zhonghao@zhonghao:~$ sudo add-apt-repository ppa:jonathonf/python-3.6
zhonghao@zhonghao:~$ sudo apt-get update
zhonghao@zhonghao:~$ sudo apt install python3.6

安装成功后需要更改默认python版本，现在输入python还是显示2.7版本

zhonghao@zhonghao:~$ sudo rm /usr/bin/python
zhonghao@zhonghao:~$ sudo ln -s /usr/bin/python3.6 /usr/bin/python
zhonghao@zhonghao:~$ PATH=/usr/bin/:$PATH
zhonghao@zhonghao:~$ python
Python 3.6.8 (default, May  7 2019, 14:58:50) 
[GCC 5.4.0 20160609] on linux
Type "help", "copyright", "credits" or "license" for more information.
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