Flask Color Change code for RPI3 Python API Server

app.py

#!flask/bin/python
import time, sys
import RPi.GPIO as GPIO
from flask import Flask

redPin = 11 #Set to appropriate GPIO
greenPin = 15 #Should be set in the 
bluePin = 22  #GPIO.BOARD format

app = Flask(__name__)

def blink(pin):
    GPIO.setmode(GPIO.BOARD)
    GPIO.setup(pin, GPIO.OUT)
    GPIO.output(pin, GPIO.HIGH)
    
def turnOff(pin):
    GPIO.setmode(GPIO.BOARD)
    GPIO.setup(pin, GPIO.OUT)
    GPIO.output(pin, GPIO.LOW)
    
def redOn():
    blink(redPin)

def redOff():
    turnOff(redPin)

def greenOn():
    blink(greenPin)

def greenOff():
    turnOff(greenPin)

def blueOn():
    blink(bluePin)

def blueOff():
    turnOff(bluePin)

def yellowOn():
    blink(redPin)
    blink(greenPin)

def yellowOff():
    turnOff(redPin)
    turnOff(greenPin)

def cyanOn():
    blink(greenPin)
    blink(bluePin)

def cyanOff():
    turnOff(greenPin)
    turnOff(bluePin)

def magentaOn():
    blink(redPin)
    blink(bluePin)

def magentaOff():
    turnOff(redPin)
    turnOff(bluePin)

def whiteOn():
    blink(redPin)
    blink(greenPin)
    blink(bluePin)

def whiteOff():
    turnOff(redPin)
    turnOff(greenPin)
    turnOff(bluePin)
    
def turnAllOff():
    redOff()
    blueOff()
    greenOff()


@app.route('/light/<light_color>')
def changelight(light_color):
    if light_color == 'red':
        turnAllOff()
        redOn()
    elif light_color == 'yellow':
        turnAllOff()
        yellowOn()
    elif light_color == 'green':
        turnAllOff()
        greenOn()
    elif light_color == 'blue':
        turnAllOff()
        blueOn()
    elif light_color == 'magenta':
        turnAllOff()
        magentaOn()
    elif light_color == 'cyan':
        turnAllOff()
        cyanOn()
    elif light_color == 'null':
        turnAllOff()

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

install.sh

sudo apt-get install python3-flask