linux系統下安裝python3

python版本：Python-3.6.4.tar.xz

下載地址：https://www.python.org/downloads/release/python-364/ 選擇XZ compressed source tarball進行下載

# yum install xz

1. 安裝依賴環境---這個步驟很重要 

# 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

2.安裝python

　　安裝在/usr/local/python3（具體安裝位置看我的喜愛）
　　建立目錄：

# mkdir /usr/local/python3

　　將Python-3.6.4.tar.xz放入在/tmp目錄下

# tar xvf xxx.tar Python-3.6.4.tar.xz 解壓文件

# cd /tmp/Python-3.6.4

# ./configure --prefix=/usr/local/python3 配置安裝位置

# make

# make instanll

3.創建軟鏈接

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

4.配置環境變量

# vi ~/.bash_profile

# PATH=$PATH:$HOME/bin:/usr/local/python3/bin

# export PATH

5.讓path生效

# source ~/.bash_profile

6.建立pip3軟鏈接

# ln -s /usr/lib/python3/Python-3.6.4/bin/pip3 /usr/bin/pip3

7.有些人提到的setuptools等咱們在安裝virtualenv時候就已經一鍵添加了並不須要了。

[root@promote Python-3.6.4]# pip3 install pymysqlCollecting pymysql  Downloading PyMySQL-0.8.0-py2.py3-none-any.whl (83kB)    100% |████████████████████████████████| 92kB 38kB/s Installing collected packages: pymysqlSuccessfully installed pymysql-0.8.0[root@promote Python-3.6.4]# ^C[root@promote Python-3.6.4]#