MAC 上升级python为最新版本

第1步：下载Python3.4

下载地址如下：

下载Mac OS X 64-bit/32-bit installer
https://www.python.org/downloads/release/python-340/


第2步: 安装

安装下载的dmg文件


第3步: 配置  创建下面的script， 改下版本号即可
[plain] view plaincopy在CODE上查看代码片派生到我的代码片
#!/bin/bash  
#python版号需要修改两个地方  
#1. new_version  
  
#sudo -i #得到超级权限  
new_version="3.4"  
  
PYPATH=/System/Library/Frameworks/Python.framework/Versions/"$new_version"  
#第1步移动新版python到mac默认目录下  
echo "move.."  
mv /Library/Frameworks/Python.framework/Versions/"$new_version" /System/Library/Frameworks/Python.framework/Versions/  
#第2步改变用户目录的用户组  
echo "chown.."  
chown -R root:wheel ${PYPATH}  
#第3步 删除原来2.7的链接  
echo "del.."  
rm /System/Library/Frameworks/Python.framework/Versions/Current  
#第4步重新链接到最新版本的python  
echo "ln.."  
ln -s ${PYPATH} /System/Library/Frameworks/Python.framework/Versions/Current  
#第5步删除旧的命令符号链接  
echo "rm.."  
rm /usr/bin/{pydoc,python,pythonw,python-config}  
echo "ln bin.."  
#第6步重新建立新的命令符号链接  
ln -s ${PYPATH}/bin/pydoc"$new_version" /usr/bin/pydoc  
ln -s ${PYPATH}/bin/python"$new_version" /usr/bin/python  
ln -s ${PYPATH}/bin/pythonw"$new_version" /usr/bin/pythonw  
ln -s ${PYPATH}/bin/python"$new_version"m-config /usr/bin/python-config  
  
  
python_param_list=`cd /usr/local/bin && ls -al |grep "Python"|awk 'ORS=" " {print $9}'`  
#第7步修复其他链接  
for i in $python_param_list;do  
  echo "info: $i"  
  rm -f /usr/local/bin/${i}  
  ln -sv /System/Library/Frameworks/Python.framework/Versions/"$new_version"/bin/${i} /usr/local/bin/${i}  
done  
  
#第8步.环境变量要修改为最新的版本号  
echo 'export PATH=/System/Library/Frameworks/Python.framework/Versions/3.4/bin:${PATH}' >> ~/.bashrc  
  
exit #退出超级权限  

查看当前python版本
[html] view plaincopy
bixiaopeng@bixiaopengtekiMacBook-Pro ~$ python --version