This is a simple REST API built with Flask in Python that allows you to perform CRUD operations (Create, Read, Update, Delete) on a list of users.

• GET /users: Retrieve all users.
• GET /users/<id>: Retrieve a user by their ID.
• POST /users: Create a new user.
• PUT /users/<id>: Update an existing user.
• DELETE /users/<id>: Delete a user by their ID.

• Python 3.x
• Flask

Before you can run the API, you need to install Flask. You can install it using pip:

pip install Flask