centos7 安装python3

• 安装依赖包

  # yum -y groupinstall "Development tools"
  # yum -y install  zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel  readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel
  

• 下载python3.7.5安装包

  # wget https://www.python.org/ftp/python/3.7.5/Python-3.7.5.tar.xz
  

• 安装python3

  解压压缩包，进入解压目录，指定安装目录，安装Python3。

  # yum install libffi-devel -y
  # tar -xvf  Python-3.7.5.tar.xz
  # cd Python-3.7.5
  # mkdir /usr/local/python3 
  # ./configure --prefix=/usr/local/python3
  # make && make install
  

  安装Python3时，会自动安装pip。假如没有，需要自己手动安装。

  # yum -y install python-pip
  

• 创建软连接

  # ln -s /usr/local/python3/bin/python3 /usr/bin/python3
  # ln -s /usr/local/python3/bin/pip3 /usr/bin/pip3