Flask
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Flask is a microframework for Python that allows for easy development of web applications. It began as an April Fool's joke but became popular enough to be developed into a full framework. The document discusses installing Flask and related packages like Flask-SQLAlchemy and Flask-Mail. It covers setting up a virtual environment for projects, installing dependencies, and includes code examples for basic Flask app configuration, SQLAlchemy integration, and using Flask-Mail to send emails. The goal is to build a simple TODO list web application to demonstrate Flask implementation.
![Flask SQLAlchemy
12
#import packages
from flask import Flask
from flask_sqlalchemy import SQLAlchemy
#initialize the app
app = Flask(__name__)
db = SQLAlchemy(app)
app.config['SQLALCHEMY_DATABASE_URI'] = 'mysql+pymysql://root:@localhost/todolist'
#run the app
app.run(debug=True, port= 8080)](https://image.slidesharecdn.com/flask-180326081107/85/Flask-12-320.jpg)
![Flask Mail
13
#import packages
from flask import Flask
from flask_mail import Mail
#initialize the app
mail = Mail()
app = Flask(__name__)
mail.init_app(app)
#route
@app.route("/")
def index():
msg = Message("Hello", sender="from@example.com", recipients=["to@example.com"])
#run the app
app.run(debug=True, port= 8080)](https://image.slidesharecdn.com/flask-180326081107/85/Flask-13-320.jpg)
Flask
- 2. Delivered As “It came out of an April Fool's joke but proved popular enough to make into a serious application in its own right.” 2
- 3. Our process is easy Flask? 3 Getting Started Implementation
- 4. 1. Flask in a Glance 4
- 5. What’s the deal? Microframework Easy to code Easy to configure 5 Well Documented Restful Testable Open Source WSGI JINJA 2
- 6. Extensible It offers great deal of functionality freedom, plug as you go 6
- 8. Virtualenv Virtualenv is a tool for creating isolated python environment 8 $ sudo apt-get install python-virtualenv $ virtualenv ENV $ . ENV/bin/activate $ deactivate virtualenv Python 2.X Python 3.X Python 2.X
- 10. Flask Installation 10 $ . ENV/bin/activate $ pip install Flask #import the flask package from flask import Flask #initialize the app app = Flask(__name__) #define a route @app.route(‘/’) def HelloWorld(): return ‘Hello World’ #run the app app.run(debug=True, port=8080)https://localhost:8080
- 11. Project dependencies flask-SQLAlchemy Python SQL toolkit and ORM that works independently from database type flask-mail Mail extension provides an interface to set up SMTP and to send messages from your views and scripts 11 $ pip install flask-SQLAlchemy $ pip install flask-mail enum Enum is a package that helps in mapping enum in sqlalchemy $ pip install enum34
- 12. Flask SQLAlchemy 12 #import packages from flask import Flask from flask_sqlalchemy import SQLAlchemy #initialize the app app = Flask(__name__) db = SQLAlchemy(app) app.config['SQLALCHEMY_DATABASE_URI'] = 'mysql+pymysql://root:@localhost/todolist' #run the app app.run(debug=True, port= 8080)
- 13. Flask Mail 13 #import packages from flask import Flask from flask_mail import Mail #initialize the app mail = Mail() app = Flask(__name__) mail.init_app(app) #route @app.route("/") def index(): msg = Message("Hello", sender="from@example.com", recipients=["to@example.com"]) #run the app app.run(debug=True, port= 8080)
- 15. 15 Web App We will be working on a simple TODO app
- 16. 16 THANKS! Pay Attention to Code!