安裝依賴

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 gcc libffi-devel python-devel openssl-devel libcurl-dev libcurl-devel

獲取tgz包（以3.6.4為例）

wget https://www.python.org/ftp/python/3.6.4/Python-3.6.4.tgz
 

解壓並切換目錄

tar -zxvf Python-3.6.4.tgz
cd Python-3.6.4

執行安裝

./configure --prefix=/usr/local
./configure --enable-optimizations
make && make install

創建Python3的軟鏈接

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

創建Pip3的軟鏈接

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

由於CentOS7默認安裝python2.7.5，有些同學想要更新成最新版本（此處以目前最新版本2.7.14為例）

python2.7.14環境搭建

獲取tgz包（以2.7.14為例）

wget https://www.python.org/ftp/python/2.7.14//Python-2.7.14.tgz

解壓並切換目錄

tar -zxvf Python-2.7.14.tgz
cd Python-2.7.14

執行安裝

./configure --prefix=/usr/local
./configure --enable-optimizations
make && make install

將老版本python更換，並更換PATH路徑

mv /usr/bin/python /usr/bin/python2.7.5
export PATH="/usr/local/bin:$PATH"
 

創建python2.7.14軟連接

ln -s /usr/local/bin/python2.7  /usr/bin/python

創建Pip2的軟鏈接

ln -s /usr/local/bin/pip2 /usr/bin/pip2

更改yum的python依賴

?註：作者把默認python的軟連接改為2.7.5了，以下以2.7.5示例

cd /usr/bin
ls yum*

yum yum-builddep yum-config-manager yum-debug-dump yum-debug-restore yumdownloader yum-groups-manager

更改以上文件頭為

#!/usr/bin/python 改為 #!/usr/bin/python2.7.5

此時便大功告成了！

CentOS7安裝python3.6保留python2.7