CentOS安裝Python3

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.下載Python3
　　python下載

# wget https://www.python.org/ftp/python/3.6.1/Python-3.6.1.tgz

3.安裝python3

　　我個人習慣安裝在/usr/local/python3
　　創建目錄：

# mkdir -p /usr/local/python3

　　解壓下載好的Python-3.x.x.tgz包(具體包名因你下載的Python具體版本不不同⽽而不不同，如：我下載的是Python3.6.1.那我這里就是Python-3.6.1.tgz)

# tar -zxvf Python-3.6.1.tgz

4.進入解壓后的目錄，編譯安裝。

# cd Python-3.6.1
# ./configure --prefix=/usr/local/python3
# make
# make install 或者 make && make install

5.建立python3的軟鏈

# ln -s /usr/local/python3/bin/python3 /usr/bin/python3
```shell
6.並將/usr/local/python3/bin加入PATH
```shell
# vim ~/.bash_profile
# .bash_profile
# Get the aliases and functions
if [ -f ~/.bashrc ]; then
. ~/.bashrc
fi
# User specific environment and startup programs
PATH=$PATH:$HOME/bin:/usr/local/python3/bin
export PATH

# source ~/.bash_profile

7.檢查Python3及pip3是否正常可用：

# python3 -V
Python 3.6.1
# pip3 -V
pip 9.0.1 from /usr/local/python3/lib/python3.6/site-packages (python 3.6)

7.不行的話在創建一下pip3的軟鏈接(我也不清楚這一步有什么用)

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