Flask Cheatsheet

#Flask Cheat Sheet and Quick Reference #Barebones App

#Access Request Data

from ask import Flask

request.args['name' 'name'] ] #q uery string arguments request.form['name'] #form data request.method #request type request.cookies.get( request.cookies.get('cookie_name') 'cookie_name') #cookies request.les['name'] #les

app = Flask(__name__) @app.route('/hello') def hello(): return 'Hello, World!' if __name__ == '__main__':   app.run(debug=True)

#Routing  @app.route('/hello/') # example.com/hello/Anthony def hello(name): return 'Hello ' + name + '!' # return s hello Antho ny!

#Allowed Request Methods @app.route('/test') #default. only allows GET requests @app.route('/test', methods=['GET', 'POST']) #allows only GET and POST. @app.route('/test', methods=['PUT']) #allows only PUT

from ask i mport url_for, url_for, redirect

Flask-Mail - http://pythonhosted.org/Flask-Mail/

@app.route('/home') def home(): return rend er_template('home.html')

FLask-RESTFul - https://ask-restful.readthedocs.org/

@app.route('/redirect') def redirect_example(): return redire ct(url_for('inde x')) #send s user to /hom e

Flask-User - http://pythonhosted.org/Flask-User/

#Abort from ask import abort()

#direct access to cong app.cong['CONFIG_NAME'] = 'cong value'

#Set Cookie

from ask import render_template @app.route('/') def index(): return rend er_template('template _le.html', var1=value1, ...)

from ask import make_response @app.route('/') def index(): resp = make _resp onse(rend er_template('index.html')) resp.set_ cooki e('cooki e_na me', 'cookie _value') return resp

#Session Handling  import session

#JSON Responses

app.cong['SECRET_KEY' 'SECRET_KEY'] ] = 'any ra ndom string' #must be set to use sessions

import jsonify

#set session @app.route('/login_success') def login_success():

@app.route('/returnstuff') def returnstuff(): num _list = [1,2,3,4,5] num_dict = {'numbers' {'numbers' : num_list, 'name' : ' 'Numbers'} Numbers'} #retur ns {'output' : {'numbers' : [1,2,3,4,5], 'name' : 'Num bers'}} return jsonify({'output' : num _dict})

Flask-SQLAlchemy - http://pypi.python.org/pypi/Flask-SQLAlchemy Flask-WTF - http://pythonhosted.org/Flask-WTF/

#Confguration

#Templates

Flask-PyMongo - http://readthedocs.org/docs/ask-pymongo/ /readthedocs.org/docs/ask-pymongo/

#Redirect

@app.route('/') def index(): abort(404 abort(404) ) #returns 404 error render_template('index.htm 'index.html' l') #this never gets executed

#import from an exported environment variable with a path to a cong le app.cong.from_envvar('ENV_VAR_NAME')

#Useful Plugins

session['key_name'] = 'key_value' #stores a secure cookie in browser return redire ct(url_for('inde x')) #read session @app.route('/') def index(): if 'key_name' in session: session: #session exists and has key

Flask-Uploads - https://ask-uploads.readthedocs.org/en/latest/

FLask-Login - http://pythonhosted.org/Flas /pythonhosted.org/Flask-Login/ k-Login/

#Useful Links Flask Website - http://ask.pocoo.org Pretty Printed Website - http://prettyprinted.com Pretty Pretty YouTube Channel https: https://www.youtube. //www.youtube.com/c/prettyprintedtuto com/c/prettyprintedtutorials rials