環境：CentOS 7

1. 安裝依賴環境

# 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. 瀏覽器打開 https://www.python.org/ftp/python/ 查看最新的Python版本，標記為3.A.B

# wget https://www.python.org/ftp/python/3.A.B/Python-3.A.B.tgz

3. 創建Python3的目錄

# mkdir /usr/local/python3

4. 解壓下載文件並切換目錄

# tar -zxvf Python-3.A.B.tgz

# cd Python-3.A.B

5. 執行

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

# make && make install

6. 創建Python3的軟鏈接

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

7. 創建Pip3的軟鏈接

# ln -s /usr/local/python3/bin/pip3 /usr/bin/pip3

8. 測試命令 python3 和 pip3

# python3

# pip3

安裝保留了原python命令調用python2

安裝完成

文章來自：http://blog.csdn.net/x_koozal/article/details/72432906

Centos7中安裝Python3