Introduction to Python Flask
Flask is a Python framework for creating web applications.
You can build following websites with Flask:
Blog Applications, Chat Applications, Data Visualisation, Dashboards, REST Applications, Admin Pages, Email-Services.
Setting Up Flask
Installing Flask
To install flask all you need to do is just run this single command on your command prompt if you are using windows, terminal if you are using MacOS or Linux
Setting up Flask is pretty simple and quick. With pip package manager, all we need to do is:
pip install flask
Once you're done with installing Flask, create a folder called FlaskApp. Navigate to the FlaskApp folder and create a file called app.py.
Import the flask module and create an app using Flask as shown:
from flask import Flask
app = Flask(__name__)
Now define the basic route / and its corresponding request handler:
@app.route("/")
def main():
return "Welcome!"
Next, check if the executed file is the main program and run the app:
if __name__ == "__main__":
app.run()
Save the changes and execute app.py:
python app.py
Point your browser to http://localhost:5000/ and you should have the welcome message.
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