find out if it's daytime using GPS coordinates and no external libraries

daytime.py

"""
  small function needed for a personal project of mine
"""
from datetime import datetime, timezone
import json
from urllib.parse import urlencode
from urllib.request import urlopen

# lat and lng can be int, float, or strings. wooo dynamic typing!
def is_daytime(lat, lng):

    # 'formatted: 0' will return the result in ISO format
    params = urlencode({"lat": lat, "lng": lng, "formatted": 0})
    url = "https://api.sunrise-sunset.org/json?{}".format(params)

    with urlopen(url) as f:
        response = json.load(f)

    if response["status"] == "OK":
        sunrise = datetime.fromisoformat(response["results"]["sunrise"])
        sunset = datetime.fromisoformat(response["results"]["sunset"])
        
        # fun fact, did u know that datetime.utcnow() returns datetime objects
        # that are not timezone aware?
        now = datetime.now(timezone.utc)

        # if it's past sunrise then it's night. if it's after sunrise but before sunset then it's day.
        return (now >= sunrise and now < sunset) or not (now < sunrise)

    raise Exception("API Error")

# Gorham, ME
print(is_daytime("43.679531", "-70.444221"))