Flask – Environment

To install flask on the system, we need to have python 2.7 or higher installed on our system. However, we suggest using python 3 for the development in the flask.

Install Virtual Environment

virtualenv is a virtual python environment builder. It helps a user to create multiple python environments side-by-side.

pip install virtualenv

Once it is installed, we can create the new virtual environment into a folder as given below.

mkdir  my_flask_project 
cd  my_flask_project 
virtualenv   venv

Activate the Virtual Environment

To activate the virtual environment the commands differ based on your operating system:

pip install virtualenv

Simple Web Page

app.py

from flask import Flask

app = Flask(__name__)

@app.route("/")
def index():
	return "<h1>Welcome to Flask</h1>"
	
if __name__=='__main__':
	app.run()

Run the Project:

Run 'app.py' file.
Browse the URL 'localhost:5000'.

Others