实时获取向日葵8号卫星图片并应用为壁纸(gnome)

earth_live.py

#!/usr/bin/env python
import os
import sys
import json
import requests
from PIL import Image
from io import BytesIO
from datetime import datetime
from dateutil import tz
import time

conf ={
    'last_refresh_url': 'http://himawari8-dl.nict.go.jp/himawari8/img/D531106/latest.json',  # latest photo
    'img_url_pattern': 'http://himawari8-dl.nict.go.jp/himawari8/img/D531106/%id/550/%s_%i_%i.png',    # scale, time, row, col
}


# Convert time
def utf2local(utc):
    from_zone = tz.tzutc()
    to_zone = tz.tzlocal()
    utc = utc.replace(tzinfo=from_zone)
    return utc.astimezone(to_zone)


def download(args):
    scale = args['scale']
    png = Image.new('RGB', (550*scale, 550*scale))
    for row in range(scale):
        for col in range(scale):
            print('Downloading %i of %i ...' % (row*scale + col + 1, scale*scale))
            strtime = args['time'].strftime("%Y/%m/%d/%H%M%S")
            url = conf['img_url_pattern'] % (args['scale'], strtime, row, col)
            r = requests.get(url)
            tile = Image.open(BytesIO(r.content))
            png.paste(tile, (550 * row, 550 * col, 550 * (row + 1), 550 * (col + 1)))
    if 'fout' in args:
        fpath = args['fout']
    else:
        #fpath = "%s.png" % utf2local(args['time']).strftime("%Y/%m/%d/%H%M%S").replace('/', '')
        fpath = "temp.png"
    print('Download over, save to file %s' % fpath)
    png.save(fpath, "PNG")


def get_last_time():
    r = requests.get(conf['last_refresh_url'])
    resp = json.loads(r.text)
    last_refresh_time = datetime.strptime(resp['date'], '%Y-%m-%d %H:%M:%S')
    return last_refresh_time


def get_last_image(fout=None, scale=1):
    print('output[%s] scale[%i]' %(fout, scale))
    last_refresh_time = get_last_time()
    args = {'time': last_refresh_time}
    args['scale'] = scale
    if fout is not None:
        args['fout'] = fout
    download(args)

def set_wallpaper():
    picpath = os.path.join(os.getcwd(), "Earth.png") # pic path under the script dir
    get_last_image(picpath, 2)
    os.system('gsettings set org.gnome.desktop.background picture-options zoom')
    os.system('gsettings set org.gnome.desktop.background picture-uri "file://%s"' % (picpath))
    print('Done.')

if __name__ == '__main__':
    while True:
        set_wallpaper()
        time.sleep(600)