下载压缩包

• 环境：centos7
• 下载编译好的压缩包python3-7-usr-local.tar.gz
• 并解压

  cd /usr/local
  tar xf python3-7-usr-local.tar.gz

升级python

• 配置保留本机python2.7并升级到python3.7

  rm -f /usr/bin/python
  sed -i 's/\/usr\/bin\/python/\/usr\/bin\/python2.7/' /usr/bin/yum
  sed -i 's/\/usr\/bin\/python/\/usr\/bin\/python2.7/' /usr/libexec/urlgrabber-ext-down
  ln -s /usr/local/python3/bin/python3 /usr/bin/python -f
  ln -s /usr/local/python3/bin/pip3 /usr/bin/pip -f

配置python

配置国内pip下载源

cd /root
mkdir .pip
cd .pip
cat >pip.conf<<EOF
[global]
index-url = http://pypi.douban.com/simple
[install]
use-mirrors =true
mirrors =http://pypi.douban.com/simple/
trusted-host =pypi.douban.com
EOF

升级pip

pip install --upgrade pip

配置环境

# cat  >> /etc/profile <<EOF
PATH=$PATH:/usr/local/python3/bin/
export PATH
EOF
# source /etc/profile