/python-flask-hello

Hello world Python Flask web service.

Primary LanguagePythonMIT LicenseMIT

Python Flask Hello World Example

CircleCI License: MIT

This is the Static Void Academy example repository for a Hello World Python Flask web server. This is meant as a simple introduction to web servers.

This tutorial has a companion article and a YouTube video which you may find useful.

Installation / Prerequisites

You will need:

  • Python3
  • Pip3
  • Pipenv

Python3 / Pip3

Mac

For Mac users, we recommend using Homebrew to install all of your libraries and packages. Follow instructions on Homebrew's site to install brew first.

Then, install Python3

brew install python

This will install Python 3.7 and pip 3. You can automatically alias/set up your python and pip commands to point to python3 and pip3 if you'd like, but we recommend against it just so you can keep track of which versions you're using. If you're using Homebrew and your OS is up-to-date, then it should automatically install the latest versions of Python and Pip for you.

Linux

Use your distribution's package manager to install Python 3

# Debian/Ubuntu
sudo apt-get update && sudo apt-get install python3.7

# CentOS/RedHat
sudo yum update && sudo yum install centos-release-scl
sudo yum install rh-python36

# Fedora
sudo dnf install python3

Windows

Download the installer from the python website and install it from there. We recommend the Windows x86-64 web-based installer if you have decently fast Internet.

Python 3.4 and later include pip by default. If your package manager installed Python 3.3 or below, then you'll need to find separate instructions to install pip3, because this README is getting huge.

Pipenv

Next, use the pip3 package manager to install the pipenv module

sudo pip3 install pipenv

After installing pipenv, the pipenv install command can be used to install the modules listed within the Pipfile contained in the directory.

pipenv install

Running

After installing the required dependencies, the virtual environment created by pipenv during the installation must now be activated.

pipenv shell

You can confirm that you have successfully activated the virtual environment if the name of the project appears in parentheses to the left of the command line. Once you have confirmed that the virtual environment has been activated, use the following commands to launch the Flask service.

export FLASK_APP=app.py
flask run