DIExample.

Using profiles with Dependency Injection

Introduction

This application illustrates Profiles (Modes) usage with Injector library. This technique can be handy to build few environments like: development, test, production (default).

Run

This application supports two running profiles:

• default
• development

To run application execute one of the:

injector_example_main.py --Profile default
injector_example_main.py --Profile development

the profile name argument here will define classes implementations accordingly.

Installation

To create a virtual environment, go to your project’s directory and run venv.

python3 -m venv venv

Venv will create a virtual Python installation in the venv folder. Note You should exclude your virtual environment directory from your version control system using .gitignore or similar. Activate the venv

source venv/bin/activate

You can confirm you’re in the virtual environment by checking the location of your Python interpreter:

which python

If you want to switch projects or otherwise leave your virtual environment, simply run:

deactivate

Pip can export a list of all installed packages and their versions using the freeze command:

pip freeze > requirements.txt

Then you can tell pip to install all the packages in requrements.txt using the -r flag:

python3 -m pip install -r requirements.txt

See more at python.org