Linux下安装python3.6

1. 安装依赖环境

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.下载Python3

https://www.python.org/downloads/

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

3.安装python3

我个人习惯安装在/usr/local/python3（具体安装位置看个人喜好）
　　创建目录：

 mkdir -p /usr/local/python3

解压下载好的Python-3.x.x.tgz包(具体包名因你下载的Python具体版本不不同⽽而不不同，如：我下载的是Python3.6.1.那我这里就是Python-3.6.1.tgz)

tar -zxvf Python-3.6.1.tgz

4.进入解压后的目录，编译安装。

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

5.建立python3的软链

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

6.并将/usr/local/python3/bin加入PATH

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

检查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.不行的话在创建一下pip3的软链接(我也不清楚这一步有什么用)

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

安装pip前需要前置安装setuptools

命令如下：

wget --no-check-certificate  https://pypi.python.org/packages/source/p/pip/pip-8.0.2.tar.gz#md5=3a73c4188f8dbad6a1e6f6d44d117eeb

tar -zxvf pip-8.0.2.tar.gz

cd pip-8.0.2

python3 setup.py build

python3 setup.py install

如果前面没布置好环境的话，就要苦逼一下了：

报错： RuntimeError: Compression requires the (missing) zlib module

我们需要在linux中安装zlib-devel包，进行支持。

yum install zlib-devel

需要对python3.5进行重新编译安装。

cd python3.6.1

make && make install

又是漫长的编译安装过程。

重新安装setuptools

python3 setup.py build

python3 setup.py install

2、安装pip

命令如下：

wget --no-check-certificate  https://pypi.python.org/packages/source/p/pip/pip-8.0.2.tar.gz#md5=3a73c4188f8dbad6a1e6f6d44d117eeb

tar -zxvf pip-8.0.2.tar.gz

cd pip-8.0.2

python3 setup.py build

python3 setup.py install