Flask Python

Flask Python:

Flask is a lightweight web framework written in Python. It allows you to build web applications easily and quickly. Flask is known for its simplicity and flexibility, making it a popular choice for developing web applications, APIs, and prototypes.

To get started with Flask, you’ll need to have Python installed on your system. You can check if Python is installed by running python –version or python3 –version in your terminal or command prompt. If Python is not installed, you can download it from the official Python website (https://www.python.org/downloads/).

Once you have Python installed, you can proceed with installing Flask.

Open your terminal or command prompt and run the following command:

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pip install flask

This command will install Flask and its dependencies on your system.

After installing Flask, you can create a new Python file and start building your Flask application.

Here is a basic example to get you started:

python

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from flask import Flask

app = Flask(__name__)

@app.route(‘/’)

def hello():

    return ‘Hello, World!’

if __name__ == ‘__main__’:

    app.run()

In this example, we import the Flask module and create an instance of the Flask class. We then define a route using the @app.route decorator, which specifies the URL path for our application. The hello function is the view function for this route, and it returns the string “Hello, World!”.

Finally, we use the app.run() method to start the Flask development server.

To run the application, save the file with a .py extension (e.g., app.py) and execute the following command in your terminal or command prompt:

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python app.py

You should see output indicating that the Flask development server is running. You can then visit http://localhost:5000 in your web browser to see the “Hello, World!” message.

This is just a basic example, and Flask provides many more features for building web applications, such as routing, request handling, templates, forms, and database integration. You can refer to the Flask documentation (https://flask.palletsprojects.com/) for more information and explore the various features and extensions available.