python2.7.X 升級至Python3.6.X

安裝Python3

 

項目是在py3環境下進行編碼的，正好yczhang默認的py版本是2，咱們還須要安裝py3才能讓程序run起來，在此以前，須要安裝開發工具包，由於要編譯安裝Python

[root@yczhang ~]# yum -y group install "Development Tools"

 

安裝Python的依賴包，不安裝依賴可能安裝完成後沒有pip3 軟件。

[root@yczhang ~]# yum -y install openssl-devel bzip2-devel expat-devel gdbm-devel readline-devel sqlite-devel vim

 

下載目前最新的Python3.6.x

 1 [root@yczhang ~]# wget https://www.python.org/ftp/python/3.6.0/Python-3.6.0.tgz

可能你須要經過yum -y install wget

 

解壓編譯安裝

[root@yczhang ~]# tar xf Python-3.6.0.tgz

[root@yczhang ~]# cd Python-3.6.0

[root@yczhang Python-3.6.0]# ./configure --prefix=/usr/local/python3.6

[root@yczhang Python-3.6.0]# make

[root@yczhang Python-3.6.0]# make altinstall

爲pip3和python3建立連接

[root@yczhang Python-3.6.0]# ln -fs /usr/local/python3.6/bin/python3 /usr/local/bin/

[root@yczhang Python-3.6.0]# ln -fs /usr/local/python3.6/bin/pip3 /usr/local/bin/

[root@yczhang Python-3.6.0]# mv /usr/bin/python /usr/bin/python_old

[root@yczhang Python-3.6.0]# ln -fs /usr/local/python3.6/bin/python3.6 /usr/bin/python

[root@yczhang Python-3.6.0]# ln -fs /usr/local/python3.6/bin/pip3.6 /usr/bin/pip

驗證安裝

[root@yczhang Python-3.6.0]# pip -V

pip 9.0.1 from /usr/local/python3.5/lib/python3.5/site-packages (python 3.6)

[root@yczhang Python-3.6.0]# python -V

Python 3.6.0

修改yum文件，不然yum將沒法下載

vim /usr/bin/yum

 

 

將

#!/usr/bin/python

 

修改成

#!/usr/bin/python2.7

 

保存便可生效