An experiment with mutable global state in flask

mutableflask.py

from flask import Flask, abort, redirect, url_for
app = Flask(__name__)

class Datastore(object):
    def __init__(self, **kwargs):
        for k,v in kwargs.items():
            self.__setattr__(k, v)
ds = Datastore(who='World')

@app.route('/')
def hello():
    return 'Hello {}'.format(ds.who)

@app.route('/greet/<name>')
def greet(name):
    ds.who = name
    return redirect(url_for('hello'))


if __name__ == '__main__':
    app.run(debug=True)

I agree.