ubuntu安装Python3.6

Ubuntu默认安装了Python2.7和3.5 输入命令python 按Ctrl+D退出python命令行 输入命令sudo add-apt-repository ppa:jonathonf/python-3.6 按Enter确认 输入命令sudo apt-get update 输入命令sudo apt-get install python3.6 按Y确认 调整Python3的优先级，使得3.6

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