docker run -v $PWD/myapp:/src/myapp -w /src/myapp python:2.7.15-alpine3.8 python app.py
-v: 挂在目录，$PWD/myapp为宿主机（容器外的路径） /src/myapp为挂载到容器内的路径
-w 指定工作路径，相当于Dockerfile里的WORKDIR
python:2.7.15-alpine3.8： 镜像名
python app.py： 在容器内执行命令，运行脚本
FROM python:3
WORKDIR /usr/src/app
COPY requirements.txt ./
RUN pip install --no-cache-dir -r requirements.txt
COPY . .
CMD [ "python", "./your-daemon-or-script.py" ]
or (if you need to use Python 2):
FROM python:2
WORKDIR /usr/src/app
COPY requirements.txt ./
RUN pip install --no-cache-dir -r requirements.txt
COPY . .
CMD [ "python", "./your-daemon-or-script.py" ]
docker build -t my-python-app .
docker run -it --rm --name my-running-app my-python-app