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Flask Development Server
Because of its notoriety and lightweight plan, Flaskis a Python web application structure that is regularly used to make online applications. It provides programmers with the resources they require to develop web applications with less redundant code. The Flask server, which is utilized to execute web applications while they are being created, will be shrouded in this illustration.
Installation
Pip may be used to install the necessary Python package named Flask before we start.
pip install Flask
Flask Server, Its Uses and Application Structure
A Python micro web framework called Flask makes it simple and quick for programmers to create web apps. Create a folder with the name of your Flask application and a Python file with the name app.py inside of it to organize your Flask application. Then define your Flask application using the code for views. Run the following command in your terminal to launch the Flask development server −
python app.py
* Serving Flask app "app" (lazy loading) * Environment: development * Debug mode: on * Restarting with stat
Algorithm
Import the Flask module and create a new Flask object.
Define the routes for your application using the @app.route decorator.
Define the functions to handle the routes.
Start the development server using app.run().
Example
app.py
from flask import Flask
app = Flask(__name__)
@app.route("/")
def home():
return "Hello, World!"
@app.route("/about")
def about():
return "This is the about page."
if __name__ == "__main__":
app.run(debug=True)
home.html (To be saved in templates/folder)
<!DOCTYPE html> <html> <head> <title>Hello, World!</title> </head> <body> <h1>Hello, World!</h1> </body> </html>
about.html (To be saved in templates/folder)
<!DOCTYPE html> <html> <head> <title>About</title> </head> <body> <h1>About</h1> <p>This is the about page.</p> </body> </html>
After importing Flask and creating a new Flask object called app the @app.route decorator is used to establish two routes, one for the home page ("/") and one for the about page ("/about"). Home() and about() are the two methods we define to handle the routes. The Flask development server with the app is then started. To activate debug mode, call run() and specify debug=True.
After you launch the programme, you can use your web browser to access the home page at http://127.0.0.1:5000/ and the about page at http://127.0.0.1:5000/about.
Applications and Features of the Flask Server
A debugger, integrated unit testing, configurable configuration, modular design, interaction with other libraries, RESTful API development, lightweight and scalability, and open source are among features that Flask offers developers. Debugger, integrated unit testing, customizable configuration, modular design, interaction with other libraries, development of RESTful APIs, lightweight and scalability, and open source are all features it offers developers. A debugger, integrated unit testing, configurable configuration, modular design, interaction with other libraries, RESTful API development, lightweight and scalability, and open source are among features that Flask offers developers.
Conclusion
Debugging and error handling, unit testing, customizable setup, modular design, interface with other libraries, construction of RESTful APIs, lightweight and scalable architecture, and open-source support are just some of the features and benefits that the Flask development server provides to developers. These features make Flask an excellent choice for building APIs and web apps.
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