This guide will help you set up a Python development environment in Visual Studio Code (VS Code) and install FastAPI for building web applications and APIs.
Before you begin, ensure that you have the following prerequisites installed:
-
Python: You should have Python installed on your system. If not, you can install it using the package manager appropriate for your platform. For macOS, you can use Homebrew:
brew install python
-
Create a Python Virtual Environment:
Create a virtual environment to isolate your Python project dependencies. Replace
myenv
with the name you prefer for your environment:python3.9 -m venv myenv
-
Activate the Virtual Environment:
Activate the virtual environment to work within it. You need to activate it every time you open VS Code or work on your project:
-
On macOS/Linux:
source myenv/bin/activate
-
-
Install FastAPI and Uvicorn:
Inside your activated virtual environment, you can install FastAPI and Uvicorn using
pip
:pip install fastapi uvicorn
These libraries will allow you to build high-performance web applications and APIs with Python.
-
Develop Your FastAPI Application:
Now, you can start building your FastAPI application in Visual Studio Code. Create your Python files, define routes, and write your FastAPI code.
-
Run Your FastAPI Application:
To run your FastAPI application, use Uvicorn from the command line. Replace
main
with the name of your Python file containing your FastAPI app andapp
with the name of your FastAPI application instance:uvicorn main:app --reload
This command will start the development server, and your FastAPI application will be accessible at
http://localhost:8000/
by default.
Remember to deactivate your virtual environment when you're done working on your project:
deactivate