# Creating a Flask Web App

Flask can be used to create a Web App, which can run from a server. You can obviously run this locally and use it as if it was fully live, this will allow you to develop the web app.

# Setup - Simple Method

You will need to create a new folder for your web app:

Now open IDLE, and from the file menu select new file. Now type in the following code:

from flask import Flask

@app.route("/")
def hello():
return "Hello World!"

if __name__ == "__main__":
app.run()


Save this has demo.py, and it must be in the folder you created:

If you run the module from IDLE it will display errors, you should be able to double click on the demo.py file in the folder:

# Setup - Visual Studio

Create a new project in Visual Studio, look in the python section and Flask:

On your own machines, this will install all of the appropriate packages into your python installation if you select 'Install into Python'. However in College will will need to do a bit more, and instead choose 'install into virtual environment':

In College we will need see this window:

You can untick the install packages option, because this will fail on college computers.

Now, find the folder within your project folder:

Now download this zip file and extract its contents into this folder:

Now click start in Visual Studio, you should see something like this:

It should automatically open a browser, it should already point to your web app: