Windows version, demonstrates the API

weather.py

#import libraries
import requests
import time

#declare variables

#open weather map's endpoint
URL = "http://api.openweathermap.org/data/2.5/weather?q="
#the authorisation key
KEY =  "&APPID=9caeab719c222439d4a2747fc6591523"
#an array of cities to cycle through, default is London
cities = ["London,uk", "New York,us", "Houston", "Miama,us", "Aberdeen,uk"]

#function that gets the raw weather data from the API
def getData(city):
    rGet = requests.get(URL+city+KEY) #sends the GET request to the URL (including the token) with the authorization header.
    return rGet

#gets the ID of the weather condition
def getWeatherID(city):
    weatherData = getData(city) #calls getData to get raw weather data
    if ("weather" in (weatherData.json())): #error handling, in case the API does not return an ID
        if ("id" in (weatherData.json()["weather"][0])):
            weatherID = weatherData.json()["weather"][0]["id"] #parses the JSON to obtain the ID
            return weatherID
        else:
            return 000
    else:
        return 000

#gets the main weather condition
def getWeatherMain(city):
    weatherData = getData(city) #calls getData to get raw weather data
    if ("weather" in (weatherData.json())): #error handling, in case the API does not return a main weather condition
        if ("main" in (weatherData.json()["weather"][0])):
            weatherMain = weatherData.json()["weather"][0]["main"] #parses the JSON to obtain the main weather condition
            return weatherMain
        else:
            return "none"
    else:
        return "none"

#gets the weather description
def getWeatherDescription(city):
    weatherData = getData(city) #calls getData to get raw weather data
    if ("weather" in (weatherData.json())): #error handling, in case the API does not return a weather description
        if ("description" in (weatherData.json()["weather"][0])):
            weatherDescription = weatherData.json()["weather"][0]["description"] #parses the JSON to obtain the weather description
            return weatherDescription
        else:
            return "none"
    else:
        return "none"

#gets the wind speed
def getWindSpeed(city): 
    weatherData = getData(city) #calls getData to get raw weather data
    if ("wind" in (weatherData.json())): #error handling, in case the API does not return a wind speed
        if ("speed" in (weatherData.json()["wind"])):
            windSpeed = weatherData.json()["wind"]["speed"] #parses the JSON to obtain the wind speed
            return windSpeed
        else:
            return 0
    else:
        return 0

#gets the wind direction (in degrees)
def getWindDirection(city):
    weatherData = getData(city) #calls getData to get raw weather data
    if ("wind" in (weatherData.json())): #error handling, in case the API does not return a wind direction
        if ("deg" in (weatherData.json()["wind"])):
            windDirection = weatherData.json()["wind"]["deg"] #parses the JSON to obtain the wind direction
            return windDirection
        else:
            return 0
    else:
        return 0

def printData(city):
    #prints the raw weather data, and each specific part of the data we isolated
    print("") #blank lines just make the data easier to read
    print(getData(city).text) #outputs the full raw data as JSON
    print("")
    print(city)
    print(getWeatherID(city))
    print(getWeatherMain(city))
    print(getWeatherDescription(city))
    print(getWindSpeed(city))
    print(getWindDirection(city))

    #prints the number for the LED colour
    print(LEDColour(city))
    print("")

#function to decide which colour LED to light up, depending on the type of weather in the response
def LEDColour(city):
    weatherID = getWeatherID(city) #calls getData to get raw weather data
    colour = 1 #variable to store which colour of LED should light up. 0 is for yellow, 1 is for blue (default) and 2 is for red

    #goes through all possible weather IDs, and assigns an LED colour for each
    if (weatherID >= 200 and weatherID < 300):
        colour = 2
    elif (weatherID >= 300 and weatherID < 400):
        colour = 1
    elif (weatherID >= 500 and weatherID < 600):
        colour = 1
    elif (weatherID >= 600 and weatherID < 700):
        colour = 1
    elif (weatherID >= 700 and weatherID < 800):
        colour = 2
    elif (weatherID >= 800 and weatherID < 900):
        colour = 0
    elif (weatherID >= 900 and weatherID <= 906):
        colour = 2
    elif (weatherID >= 951 and weatherID <= 956):
        colour = 0
    elif (weatherID >= 957 and weatherID <= 962):
        colour = 0
    else:
        colour = 1

    return colour

#function to change to the next city in the array (set up at the start of the program)
def changeCities():
    global cityPosition
    if(cityPosition < 4): #there are 5 cities to cycle through; if the current position is < 4 (so it is 0, 1, 2 or 3) simply increase it by 1
        cityPosition = cityPosition + 1
    else: #otherwise, we have reached the end of the cycle and must begin again; therefore, set position to 0
        cityPosition = 0;

#function to assign a direction (to move the motors in) based on the degree returned by the API
def motorDirection(city):
    deg = getWindDirection(city)
    global direction #Gives angle for servo motor to turn the turntable the correct amount; ratio is 1:2+2/7
    direction = 0

    #gives ranges in degrees for each direction
    if (deg >= 0 and deg <= 45):
        direction = 0
    elif (deg >= 45 and deg <= 90):
        direction = 16.2
    elif (deg >= 90 and deg <= 135):
        direction = 32.4
    elif (deg >= 135 and deg <= 180):
        direction = 48.6
    elif (deg >= 180 and deg <= 225):
        direction = 64.8
    elif (deg >= 225 and deg <= 270):
        direction = 81
    elif (deg >= 270 and deg <= 315):
        direction = 97.2
    elif (deg >= 315 and deg < 360):
        direction = 113.4
    else:
        direction = 0

    print(direction)
    return(direction)

cityPosition = 0 #initialises cityPosition to 0

num = 19 #sets "num" (the LED colour) to 19 (blue) for default

while (True):
    #assigns the correct GPIO port for depending on the correct LED colour
    if (LEDColour(cities[cityPosition]) == 0):
        num = 13
        print("Yellow")
    elif (LEDColour(cities[cityPosition]) == 1):
        num = 19
        print("Blue")
    elif (LEDColour(cities[cityPosition]) == 2):
        num = 26
        print("Red")
    else:
        num = 19
        print("Blue")


    printData(cities[cityPosition]) #outputs all the data
    changeCities()
    time.sleep(3) #waits 3 seconds to allow time to read the data

print("Program finished.")