apod.py

# coding: utf-8
import requests
import datetime

API_KEY = '' # Get a free API KEY on https://api.nasa.gov/ 
URL = 'https://api.nasa.gov/planetary/apod'
START = datetime.date(2019, 1, 1)
END = datetime.date.today()
IMGS_FOLDER = 'imgs'
ERROR_FILE = 'apod_errors.txt'


def print_data(data: str, filename: str):
    with open(ERROR_FILE, 'a') as f:
        print(data, file=f)


def write_file(img_url: str, filename: str):
    r = requests.get(img_url, stream=True)
    with open(filename, 'wb') as f:
        for chunk in r.iter_content(chunk_size=512*1024):
            f.write(chunk)


delta = datetime.timedelta(days=1)
date = START
while date < END:
    date = date + delta
    d = date.strftime(r'%Y-%m-%d')
    img_url = f"{URL}?api_key={API_KEY}&date={d}"
    data = requests.get(img_url).json()

    if data['media_type'] == 'image':
        try:
            filename = d + '-' + data['hdurl'].split('/')[-1]
            write_file(data['hdurl'], '/'.join([IMGS_FOLDER, filename]))
        except KeyError as e:
            print_data(data, ERROR_FILE)