rest.py

#!/usr/bin/env python
import web
import json
import time
import metoffer
from BlinkyTape import BlinkyTape
from datetime import datetime

bb = BlinkyTape('/dev/ttyACM0')

urls = (
    '/colour', 'show_colour',
    '/pattern', 'show_pattern',
    '/weather', 'show_weather',
)

app = web.application(urls, globals())

class show_weather:
    def GET(self):
        temps = getTemperatures()
        x = 0
        for i in temps:
            if (datetime.utcnow().day != i["timestamp"][0].day or i["timestamp"][0].hour > datetime.utcnow().hour-3):
                colour = convertTemperatureToRgb(i["Temperature"][0])
                bb.sendPixel(colour[0],colour[1],colour[2])
                x = x + 1
        for i in range(x,60):
            bb.sendPixel(0,0,0)
        bb.show()
        return 'status: "success"'

class show_colour:
    def POST(self):
        data = web.data()
        j = json.loads(data)
        red = j['red']
        green = j['green']
        blue = j['blue']
        bb.displayColor(red, green, blue)
        return 'status: "success"'

class show_pattern:
    def POST(self):
        data = web.data()
        j = json.loads(data)
        pixel_count = len(j)
        for i in range(0,60):
            if (i >= pixel_count):
                bb.sendPixel(0,0,0)
            else:
                bb.sendPixel(j[i]['red'],j[i]['green'],j[i]['blue'])
        bb.show()
        return 'status: "success"'

if __name__ == "__main__":
    app.run()

RGB_OFFSET = 25

def getTemperatures():
    print "getTemperatures start"
    api_key = '35d53d57-9aa0-45de-9772-0871f0ceffda'
    M = metoffer.MetOffer(api_key)
    x = M.nearest_loc_forecast(52.2793,-1.5803, metoffer.THREE_HOURLY)
    y = metoffer.parse_val(x)
    print "data retrieved"

    for i in y.data:
        print("{} - {}".format(i["timestamp"][0].strftime("%d %b, %H:%M"), i["Temperature"][0]))

    print "getTemperatures end"
    return y.data

def increasingColourOffset(offset):
        return offset * RGB_OFFSET

def decreasingColourOffset(offset):
        return 255 - increasingColourOffset(offset)

#20 10 0 10 20 30 40
def convertTemperatureToRgb(temperature):
    if (temperature <= -15):
        return [0,0,255]
    elif (temperature <= -5):
        # -20 < t <= -5
        g = increasingColourOffset(temperature + 15)
        return [0,g,255]
    elif (temperature <= 5):
        # -5 < t <= 10
        b = decreasingColourOffset(temperature + 5)
        return [0,255,b]
    elif (temperature <= 15):
        # 10 < t <= 25
        r = increasingColourOffset(temperature - 5)
        return [r,255,0]
    elif (temperature <= 25):
        # 25 < t <= 40
        g = decreasingColourOffset(temperature - 15)
        return [255,g,0]
    else:
        # 40 < t
        return [255,0,0]    

    return [0,0,0]