用vim 新建一个Dockerfile和sources.list文件，在里面添加如下内容。
#sources.list
deb http://mirrors.163.com/ubuntu/ xenial main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ xenial-security main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ xenial-updates main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ xenial-proposed main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ xenial-backports main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ xenial main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ xenial-security main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ xenial-updates main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ xenial-proposed main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ xenial-backports main restricted universe multiverse
#Dockerfile
FROM ubuntu:16.04
MAINTAINER NSS/CZH
COPY ./sources.list /etc/apt/sources.list
RUN apt-get update && apt-get install gcc -y && apt-get install g++ -y && apt-get install gdb -y && apt-get install python-software-properties -y && apt-get install software-properties-common -y && add-apt-repository ppa:deadsnakes/ppa -y && apt-get update && apt-get install python3.6 -y && rm /usr/bin/python && ln -s /usr/bin/python3.6 /usr/bin/python && rm /usr/bin/python3 && ln -s /usr/bin/python3.6 /usr/bin/python3 && apt-get install python3-pip -y && pip3 install pip -U && rm /usr/bin/pip3 && ln -s -f /usr/local/bin/pip3 /usr/bin/pip3 && ln -s -f /usr/local/bin/pip3 /usr/bin/pip && pip config set global.index-url https://pypi.tuna.tsinghua.edu.cn/simple && pip install django && rm -rf /var/lib/apt/lists/*
使用docker build -t ubuntu:py36 .创建镜像
docker中搭建Ubuntu:16.04+python3.6+django环境
原文：https://www.cnblogs.com/nickshen/p/14019590.html