在docker创建的centos容器里，配置python3环境

1. 运行docker容器：

docker run -i –t centos /bin/bash#这时进入centos虚拟环境

# 安装依赖

yum install openssl-devel bzip2-devel expat-devel gdbm-devel readline-devel sqlite-devel  -y

yum -y install gcc automake autoconf libtool make #安装make编译所需的gcc,g++编译器

#开始安装python3

yum install wgetwget https://www.python.org/ftp/python/3.5.3/Python-3.5.3.tgz

tar zxvf Python-3.5.3.tgz

mv Python-3.5.3 /usr/localcd/usr/local/Python-3.5.3 

./configure  

 make

make install

#删除旧版本的依赖，并创建软链接

rm -rf /usr/bin/python

ln -s /usr/local/bin/python3.5 /usr/bin/python

#没想到最后python3与python2冲突了，导致yum不能用了,不过修改一下

vi /usr/bin/yum

vi /usr/libexec/urlgrabber-ext-down  #这两个文件第一行的python改为为python2.7即可

* 安装pip3

1：安装依赖yum install openssl-devel  -y

yum install zlib-devel  -yyum install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel -y

2：安装setuptools

wget --no-check-certificate  https://pypi.python.org/packages/source/s/setuptools/setuptools-19.6.tar.gz   

tar -zxvf setuptools-19.6.tar.gz

rm -rf setuptools-19.6.tar.gz

cd setuptools-19.6

python3 setup.py build

python3 setup.py install

3：安装pip

方法1：

wget --no-check-certificatehttps://pypi.python.org/packages/source/p/pip/pip-8.0.2.tar.gz

tar -zxvf pip-8.0.2.tar.gz

rm -rf pip-8.0.2.tar.gz

cd pip-8.0.2

python3 setup.py build

python3 setup.py install  #更新为最新版pip install --upgrade pip

方法2：

1.yum -y install epel-release

2..执行成功之后，再次执行yum install python-pip

3.对安装好的pip进行升级 pip install –upgrade pip