wgwz

I asked this question a few weeks ago in the Raspberry Pi Forum's.
Unfortunately no one got back to me. 
I am sure there is a simple solution to my problem. 

So I am making a really simple webapp, which has two buttons. 
One button starts a blink sequence on a multi-colored LED. 
The other button turns the multi-LED completely off.

The blink sequence requires a loop. 
The loop freezes the webapp. 

wgwz

OS: Linux Mint 17.2

Using Anaconda Distribution Python

---

The following worked for installation of pymks.

This walks through setting up sfepy as well

wgwz

Persuading WTForms to Generate Checkboxes
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

WTForms takes the pain out of handling forms and validation, you define your form, 
tell it what validation checks the data needs to pass, then WTForms uses it's 
widgets to generate the html.

A common problem you'll face is "Multiple select fields suck, they are confusing-- 
how can I show the user a nice list of checkboxes instead?"

wgwz

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

wgwz

from flask import Flask, render_template_string, request
from flask_bootstrap import Bootstrap
from jinja2 import Template
from flask_wtf import Form
from wtforms import StringField
from wtforms.validators import DataRequired
from flask_sqlalchemy import SQLAlchemy


# Build the app along with its extensions and the route

wgwz

Keybase proof

I hereby claim:

• I am wgwz on github.
• I am wgwz (https://keybase.io/wgwz) on keybase.
• I have a public key ASAshCTfdnjeJYe5Ce-UY9fcQgWi5vu8dRhaFDTa5Dxttgo

To claim this, I am signing this object:

wgwz

from flask import Flask, Blueprint
app = Flask(__name__)

bp = Blueprint("test", __name__)
@bp.route("/test/")
def test():
    return "TEST"
    
app.register_blueprint(bp, subdomain="test")

wgwz

gunicorn -c "python:config.gunicorn" "api:create_app()"
[2016-10-18 14:01:37 -0400] [3654] [INFO] Starting gunicorn 19.6.0
[2016-10-18 14:01:37 -0400] [3654] [INFO] Listening at: http://0.0.0.0:8000 (3654)
[2016-10-18 14:01:37 -0400] [3654] [INFO] Using worker: eventlet
[2016-10-18 14:01:37 -0400] [3657] [INFO] Booting worker with pid: 3657
127.0.0.1 - - [18/Oct/2016:14:01:44 -0400] "GET /api/v1/ HTTP/1.1" 200 3101 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36" in 87173µs
127.0.0.1 - - [18/Oct/2016:14:01:44 -0400] "GET /socket.io/?EIO=3&transport=polling&t=1476813704788-0 HTTP/1.1" 200 119 "http://localhost:8000/api/v1/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36" in 782µs
127.0.0.1 - - [18/Oct/2016:14:01:44 -0400] "POST /socket.io/?EIO=3&transport=polling&t=1476813704809-1&sid=ac7af57072f74aa49d3c92e79bab9f9e HTTP/1.1" 200 2 "http://localhost:8000/ap

wgwz

@app.route("/test_session")
def write():
  session['uid']='my_uid'
  return session.get('uid')
  
@app.route("/read_session")
def read():
  return session.get('uid')

wgwz

def add_cors_headers(response):
    response.headers['Access-Control-Allow-Origin'] = '*'
    if request.method == 'OPTIONS':
        response.headers['Access-Control-Allow-Methods'] = 'DELETE, GET, POST, PUT'
        headers = request.headers.get('Access-Control-Request-Headers')
        if headers:
            response.headers['Access-Control-Allow-Headers'] = headers
    return response
app.after_request(add_cors_headers)