python实现抓取必应图片设置桌面

源码参考https://github.com/vbirds/pyWallpaper，代码风格不错

本人只是将其适配到python3.5，并消除一些bug，源代码中桌面地址未使用绝对路径导致win10 下无法成功设置桌面

#python： 3.5
#os： win10 home

#-*-coding:utf-8-*-

from PIL import Image
import win32gui
import win32con
import win32api
import os
import threading
import urllib.request
import time
import sys
import json

'''
{
    "images":[
        {
            "startdate":"20170827",
            "fullstartdate":"201708271600",
            "enddate":"20170828",
            "url":"/az/hprichbg/rb/BotallackCornwall_ZH-CN11396172846_1920x1080.jpg",
            "urlbase":"/az/hprichbg/rb/BotallackCornwall_ZH-CN11396172846",
            "copyright":"康沃尔郡内的巴特莱克矿场， 英国 (© Robert Harding/Masterfile)",
            "copyrightlink":"http://www.bing.com/search?q=botallack+manor&form=hpcapt&mkt=zh-cn",
            "quiz":"/search?q=Bing+homepage+quiz&filters=WQOskey:%22HPQuiz_20170827_BotallackCornwall%22&FORM=HPQUIZ",
            "wp":true,
            "hsh":"5eb81f1029c57dfa1cc5f69ca871f4b1",
            "drk":1,
            "top":1,
            "bot":1,
            "hs":[]
        }
    ],
    "tooltips":{
        "loading":"正在加载...",
        "previous":"上一个图像",
        "next":"下一个图像",
        "walle":"此图片不能下载用作壁纸。",
        "walls":"下载今日美图。仅限用作桌面壁纸。"
    }
}
'''


class Wallpaper:

    def __init__(self, time=60):
        self.count = 0
        if time <= 0 :
            self.time = 60
        self.time = time
        self.urltemplate = 'http://cn.bing.com/HPImageArchive.aspx?format=js&idx=%d&n=1&nc=1361089515117&FORM=HYLH1'
        self.baImageUrlList = []
        self.localFileName  = ''
        self.localBMPFileName  = ''
        self.imagedir = './images/'
        self.bmpdir = './bmpimage/'
        self.bmplist = []

    def start(self):
        self.prepareDir()
        self.parserImageUrl()
        self.download_images()
        self.image_convert_bmp()
        self.set_wall_func()

    def prepareDir(self):
        if not os.path.exists(self.imagedir):
            os.makedirs(self.imagedir)
        if not os.path.exists(self.bmpdir):
            os.makedirs(self.bmpdir)
         
    def parserImageUrl(self):

        for i in range(0, 7, 1):
            url = self.urltemplate % i #use i replace format 
            try:
                content = urllib.request.urlopen(url,None).read().decode("utf-8")# 由于有中文，decode("utf-8")必须
            except:
                print(url)
                print("parse try again")
            decodedjson = json.loads(content)
            imageurl = decodedjson['images'][0]['url']

            self.baImageUrlList.append('https://cn.bing.com'+imageurl)

    def download_images(self):

        for url in self.baImageUrlList:
            imagename = os.path.basename(url)
            imagepath = self.imagedir + imagename
            print(imagepath)
            f = open(imagepath, 'wb')
            try:
                conn = urllib.request.urlopen(url)
            except:
                print(url)
                print("download try again")
            f.write(conn.read())
            f.close()

    def image_convert_bmp(self):
        imaglist = os.listdir(self.imagedir)
        for imagepath in imaglist:
            file_name = os.path.basename(imagepath)
            file_name_type = os.path.splitext(file_name)
            file_name = file_name_type[0]
            newpath = self.bmpdir + file_name + '.bmp'
            imagepath  = './images/' + imagepath

            bmpImage = Image.open(imagepath)
            bmpImage.save(newpath, "BMP")
            self.bmplist.append(sys.path[0]+'\bmpimage\'+file_name + '.bmp')

    def setWallpaper(self, imagepath):
        k = win32api.RegOpenKeyEx(win32con.HKEY_CURRENT_USER,"Control Panel\Desktop",0,win32con.KEY_SET_VALUE)
        win32api.RegSetValueEx(k, "WallpaperStyle", 0, win32con.REG_SZ, "2") #2拉伸适应桌面,0桌面居中
        win32api.RegSetValueEx(k, "TileWallpaper", 0, win32con.REG_SZ, "0")
        print(imagepath)
        win32gui.SystemParametersInfo(win32con.SPI_SETDESKWALLPAPER,imagepath, 1+2)#文件需要使用完整路径

    def set_wall_func(self):
        list_size = len(self.bmplist)
        index = self.count % list_size
        filename = self.bmplist[index]
        self.count += 1
        self.setWallpaper(filename)
        self.set_wall_timer()

    def set_wall_timer(self):
        timer = threading.Timer(self.time, self.set_wall_func)
        timer.start()



if __name__ == '__main__':

    bing = Wallpaper(300)
    bing.start()