Create a simple Python development environment with VS Code and Docker

Introduction

When developing with Python running on Docker with VS Code, create a simple development environment that will complete the code properly.

Preparation

Install VS Code Docker and Romete-Containers extensions スクリーンショット 2020-12-21 0.34.01.png スクリーンショット2020-12-210.38.52.png

Build Python 3 environment with Docker

For the Python environment construction itself, I referred to Try to create a Python3 environment easily with docker.

├ Dockerfile
├ docker-compose.yml
└ workspace/ (Mount this on a container and develop)

`Dockerfile`


FROM python:3

RUN apt-get update
RUN apt-get -y install locales && \
    localedef -f UTF-8 -i ja_JP ja_JP.UTF-8
ENV LANG ja_JP.UTF-8
ENV LANGUAGE ja_JP:ja
ENV LC_ALL ja_JP.UTF-8
ENV TZ JST-9
ENV TERM xterm

RUN pip install --upgrade pip
RUN pip install --upgrade setuptools

Mount workspace on the container. (To inherit the edited contents in the container)

`dokcer-compose.yml`


version: '3'
services:
  python3:
    restart: always
    build: .
    container_name: 'python3'
    working_dir: '/workspace/'
    tty: true
    volumes:
      - ./workspace:/workspace

Start container

$ docker-compose up -d --build

Verification

$ docker ps
CONTAINER ID        IMAGE                COMMAND             CREATED             STATUS              PORTS               NAMES
ab664cabca5f        python-dev_python3   "python3"           44 minutes ago      Up 44 minutes                           python3

Install the required libraries (install numpy properly to check code completion)

pip install numpy

Connect to the started container with VS Code

If you specify a container from Docker in the sidebar and select Attach Visual Studio Code, a new VS Code window connected to the container will open. スクリーンショット 2020-12-21 0.43.53.png スクリーンショット2020-12-210.08.30.png Select "Open Folder" and select the mounted directory. スクリーンショット 2020-12-21 0.13.56.png To use a Python extension in a container, install the Python extension in the container. スクリーンショット 2020-12-21 0.16.36.png Create a suitable Python file and specify Python running on Docker as the interpreter. This time Python 3.9.1 スクリーンショット 2020-12-21 0.27.53.png This will complement it properly when using the library installed in the container. スクリーンショット 2020-12-21 0.27.03.png

reference

Try to create a python3 environment easily with docker