How to Create an App

1 min readNov 29, 2020

Use Flask to create a basic app in Python

Introduction:

In the next five minutes, you will create your own working app in Flask using Python.

Go to Github, and make a new repo for your project, so that it can be saved to the web.

Now, clone the repo to your local machine, so you can edit it and push changes.

Create and activate a virtual environment for this project.

If do not already have virtualenv, you can install it from the command line using pip, as follows.

pip install virtualenv

Make sure it is really installed by checking the version. Type into the terminal:

virtualenv --version

Now create the virtual environment by typing into the command line:

virtualenv my-venv

Create a new file called app.py

It should contain this:

# app.py
from flask import Flaskapp = Flask(__name__)@app.route('/')
def hello():
    return 'Hello, World!'

Run your app on the local server.

Type these three commands into the terminal:

set FLASK_APP=flaskr
set FLASK_ENV=development
flask run

Congrats! You have created from scratch your first functioning app using Python and Flask!