linux下python的安裝

安裝步驟如下

1 準備編譯環境

yum groupinstall ‘Development Tools‘

yum install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel sqlit

2 下載 Python3.5代碼包

wget https://www.python.org/ftp/python/3.5.2/Python-3.5.2.tar.xz

3 編譯

tar Jxvf Python-3.5.2.tar.xz

cd Python-3.5.2

./configure --prefix=/usr/local/python3

make && make install

4 設置環境變量

echo ‘export PATH=$PATH:/usr/local/python3/bin‘ >> ~/.bashrc

5 設置目錄（這樣做的目的是在系統任意目錄敲入python3調用的是python3.5的命令）

mv /usr/bin/python /usr/local/python.bak

rm -rf /usr/local/python2

ln -sv /usr/local/python2.6 /usr/bin/python2

ln -sv /usr/local/python3/bin/python3.5 /usr/bin/python

6 修改yum腳本，使其指向舊版本的python，已避免yum無法運行

sed -i ‘s$#!/usr/bin/python$#!/usr/bin/python2.6$g‘ /usr/bin/yum

7 測試

輸入python 顯示如下

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Centos6.5中實現python2與python3的並存