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## Test and Deploy a python application
This example will guide you how to run tests in your Python application and deploy it automatically as Heroku application.
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You can checkout the example [source ](https://gitlab.com/ayufan/python-getting-started ) and check [CI status ](https://gitlab.com/ayufan/python-getting-started/builds?scope=all ).
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### Configure project
This is what the `.gitlab-ci.yml` file looks like for this project:
```yaml
test:
script:
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# this configures Django application to use attached postgres database that is run on `postgres` host
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- export DATABASE_URL=postgres://postgres:@postgres:5432/python-test-app
- apt-get update -qy
- apt-get install -y python-dev python-pip
- pip install -r requirements.txt
- python manage.py test
staging:
type: deploy
script:
- apt-get update -qy
- apt-get install -y ruby-dev
- gem install dpl
- dpl --provider=heroku --app=gitlab-ci-python-test-staging --api-key=$HEROKU_STAGING_API_KEY
only:
- master
production:
type: deploy
script:
- apt-get update -qy
- apt-get install -y ruby-dev
- gem install dpl
- dpl --provider=heroku --app=gitlab-ci-python-test-prod --api-key=$HEROKU_PRODUCTION_API_KEY
only:
- tags
```
This project has three jobs:
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1. `test` - used to test Django application,
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2. `staging` - used to automatically deploy staging environment every push to `master` branch
3. `production` - used to automatically deploy production environmnet for every created tag
### Store API keys
You'll need to create two variables in `Project > Variables` :
1. `HEROKU_STAGING_API_KEY` - Heroku API key used to deploy staging app,
2. `HEROKU_PRODUCTION_API_KEY` - Heroku API key used to deploy production app.
Find your Heroku API key in [Manage Account ](https://dashboard.heroku.com/account ).
### Create Heroku application
For each of your environments, you'll need to create a new Heroku application.
You can do this through the [Dashboard ](https://dashboard.heroku.com/ ).
### Create runner
First install [Docker Engine ](https://docs.docker.com/installation/ ).
To build this project you also need to have [GitLab Runner ](https://about.gitlab.com/gitlab-ci/#gitlab-runner ).
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You can use public runners available on `gitlab.com/ci` , but you can register your own:
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```
gitlab-ci-multi-runner register \
--non-interactive \
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--url "https://gitlab.com/ci/" \
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--registration-token "PROJECT_REGISTRATION_TOKEN" \
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--description "python-3.5" \
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--executor "docker" \
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--docker-image python:3.5 \
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--docker-postgres latest
```
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With the command above, you create a runner that uses [python:3.5 ](https://hub.docker.com/r/_/python/ ) image and uses [postgres ](https://hub.docker.com/r/_/postgres/ ) database.
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To access PostgreSQL database you need to connect to `host: postgres` as user `postgres` without password.