ubuntu16安装Python3.7

ubuntu16系统自带了python2.7和python3.5；不要卸载ubuntu自带的python版本；ubuntu下不同版本的python可以共存，可直接安装python3.7。
1.升级包索引和软件

sudo apt update
sudo apt upgrade -y


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2.安装编译所需包

sudo apt install build-essential zlib1g-dev libncurses5-dev libgdbm-dev libnss3-dev libssl-dev libreadline-dev libffi-dev wget


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3.下载Python3.7官网下载Python-3.7.4.tgz文件

wget https://www.python.org/ftp/python/3.7.4/Python-3.7.4.tgz


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4.解压Python安装包

tar -xzvf Python-3.7.4.tgz


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5.编译和安装

cd Python-3.7.4
./configure --prefix=/usr/local/src/python37  # 配置安装位置
sudo make
sudo make install


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6.建立软连接

sudo ln -s /usr/local/src/python37/bin/python3.7 /usr/bin/python3.7
sudo ln -s /usr/local/src/python37/bin/pip3.7 /usr/bin/pip3.7


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接下来你就可以使用python3.7，而不会影响系统自带的python2.7和python3.5如果你想用python3.7替换掉系统默认的python3

sudo rm -rf /usr/bin/python3
sudo ln -s /usr/local/src/python37/bin/python3.7 /usr/bin/python3


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输入python3默认就是你安装好的python3.7了
卸载python（如果需要）

sudo apt remove python3.7


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