Python Example

This guide covers configuring continuous integration pipelines for Python projects. If you’re new to Drone please read our Tutorial and build configuration guides first.

Build and Test

In the below example we demonstrate a pipeline that executes pip install and pytest commands. These commands are executed inside a Docker container, downloaded at runtime from DockerHub.

kind: pipeline
type: kubernetes
name: default

steps:
- name: test
  image: python
  commands:
  - pip install -r requirements.txt
  - pytest

Please note that you can use any Docker image in your pipeline from any Docker registry. You can use the official python images, or your can bring your own.

Test Multiple Versions

You can use Drone’s multi-pipeline feature to concurrently test against multiple versions of Python. This is equivalent to matrix capabilities found in other continuous integration systems.

---
kind: pipeline
type: kubernetes
name: python-2

steps:
- name: test
  image: python:2
  commands:
  - pip install -r requirements.txt
  - pytest

---
kind: pipeline
type: kubernetes
name: python-3-3

steps:
- name: test
  image: python:3.3
  commands:
  - pip install -r requirements.txt
  - pytest

---
kind: pipeline
type: kubernetes
name: python-3-4

steps:
- name: test
  image: python:3.4
  commands:
  - pip install -r requirements.txt
  - pytest
...

If you find this syntax too verbose we recommend using jsonnet. If you are unfamiliar with jsonnet please read our guide.

local Pipeline(name, image) = {
  kind: "pipeline",
  type: "kubernetes",
  name: name,
  steps: [
    {
      name: "test",
      image: image,
      commands: [
        "pip install -r requirements.txt",
        "pytest"
      ]
    }
  ]
};

[
  Pipeline("python-2", "python:2"),
  Pipeline("python-3-3", "python:3.3"),
  Pipeline("python-3-4", "python:3.4"),
  Pipeline("python-3-5", "python:3.5"),
  Pipeline("python-3-6", "python:3.6"),
]

Test Multiple Architectures

You can use Drone’s multi-pipeline feature to concurrently test your code on multiple architectures and operating systems.

---
kind: pipeline
type: kubernetes
name: test-on-amd64

platform:
  arch: amd64

steps:
- name: test
  image: python
  commands:
  - pip install -r requirements.txt
  - pytest

---
kind: pipeline
type: kubernetes
name: test-on-arm64

platform:
  arch: arm64

steps:
- name: test
  image: python
  commands:
  - pip install -r requirements.txt
  - pytest

...

If you find this syntax too verbose we recommend using jsonnet. If you are unfamiliar with jsonnet please read our guide.