Flask is a Python web microframework. It provides a simple interface to create HTTP middleware, URLs, views, and more!
This is a quick guide on how to get started with the Flask Framework. This free download will help you create beautiful, responsive websites quickly and easily!
Cheat sheets are important because they allow you to quickly look up information without having to fumble around for the document containing that piece of information. This Cheat Sheet for flask is a great addition to any developer's library.
Importing Flask
from flask import Flask
Most used import functions
from flask import Flask, render_template, redirect, url_for, request
Boilerplate
from flask import Flask
app = Flask(__name__)
@app.route("/")
def hello_world():
return "<p>Hello, World!</p>"
app.run()
Route method
methods = ['GET', 'POST']
Debug Mode
app.run(debug=True)
Change Host
app.run(host='0.0.0.0')
Change Port
app.run(port=80)
SQLAlchemy
from flask_sqlalchemy import SQLAlchemy
Database URI
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///test.db'
Initialization
db = SQLAlchemy(app)
Creating Model
class TableName(db.Model):
column_1 = db.Column(db.Integer, primary_key=True)
column_2 = db.Column(db.String(80), nullable=False)
column_3 = db.Column(db.String(12), nullable=False)
Get all data(.all())
data = ClassName.query.filter_by().all()
Filtered data(.first())
data = ClassName.query.filter_by().first()
Send/add data to database
data_to_send = ClassName(column_1=dataset1, column_2=dataset2)
db.session.add(data_to_send)
db.session.commit()
Delete data from the database
db.session.delete(data_to_send)
db.session.commit()
Render Template
render_template("file.html")
Method to return database items
def __repr__(self) -> str:
return f"{self.item}"
Printing returned content from the method
data = ClassNameWithMethod.query.all()
print(data)
I hope this cheat sheet is helpful, and I'm always open to discussions in the comments.
