Está cansado de procurar um wallpaper legal para sua areá de trabalho? Com esse script escrito em Python 3 você pode pesquisar por imagens no Google e utilizando o visualizador de imagens feh defini-las como seu wallpaper sem ter que fazer quase nada.

Dependências:

feh     # duh !
bs4  - BeautifulSoup  

Instalação em distros  baseadas no Debian:  

$ sudo apt-get install feh python3-bs4 -y

Executando o script:

$ python3 random_google_images.py wallpaper 4k -d 5

Para ver mais opções:

$ python3 random_google_images.py --help

• Download 6937.random_google_images.py
• Enviar nova versão

Esconder código-fonte

#!/usr/bin/env python3.5
try:
   from bs4 import BeautifulSoup
except ImportError as err:
   sys.exit(str(err))
from datetime import datetime
from urllib.request import Request, urlopen
import subprocess as sp
import argparse
import logging
import json
import os, sys
import time

parser = argparse.ArgumentParser(description="Search images on google and change your background with feh")
parser.add_argument('search', type=str, action='store', help="search a image on google", nargs='*')
parser.add_argument('--clear', action='store_true', help='clear cache')
parser.add_argument('-r', '--recent', action='store_true', help='shows recent searches')
parser.add_argument('-v', '--verbosity', action='store_true', help='shows debugging information')
parser.add_argument('-d', action='store', type=int, help='delay in secunds between wallpapers default is 3s', default=3)
args = parser.parse_args()
search = '+'.join(args.search)    # if you search foo bar will be equal foo+bar

script_path = os.path.dirname(os.path.abspath(__file__)) # get the script absolute path
# logging config
LOG_FORMAT = "%(levelname)s %(asctime)s - %(message)s" 
log_path=os.path.join(script_path, 'info.log')
logging.basicConfig(filename=log_path, level=logging.INFO, format=LOG_FORMAT, filemode='w')
logger = logging.getLogger()

class Cache:

   def __init__(self):
      """ create cache if not exists """
      self.search_cache_path = os.path.join(script_path, 'cache/search_cache.json')
      if not os.path.exists(script_path + '/cache'):
         os.mkdir(script_path + '/cache')
      if not os.path.exists(self.search_cache_path) or args.clear:
         open(self.search_cache_path, 'w').close()
      
      if args.recent:
         # shows recent search cache
         recent_cache = self.load_cache()
         if recent_cache:
            [ print(k, end=' ') for k in recent_cache.keys() ]
         else:
            print('No recent cache.')

   def dump_cache(self, images):
      """ write cache """
      with open(self.search_cache_path, 'r') as fp:
         if os.stat(self.search_cache_path).st_size > 0: 
            search_cache = eval(json.load(fp))
            search_cache[search] = images
         else:
            search_cache = json.dumps({search: images})
         
      with open(self.search_cache_path, 'w') as fp:
         json.dump(str(search_cache), fp)

   def load_cache(self):
      """ return a list """
      if os.stat(self.search_cache_path).st_size > 0:
         with open(self.search_cache_path) as fp:
            return eval(json.load(fp))

   def update_cache(self, image):
      """ remove images from cache """
      cache = self.load_cache()
      try:
         cache[search].remove(image)
         return cache[search]
      except Exception as err:
         logger.error(err)

headers = {
   'User-Agent': 'Mozilla/5.0 (Windows NqT 6.1) AppleWebKit/537.36 \
   (KHTML, like Gecko) Chrome/41.0.2228.0 Safari/537.3'
}

def get_soup():
   """ return html """
   url = 'https://www.google.com/search?q={}&source=lnms&tbm=isch'.format(search)
   try:
      req = Request(url, headers=headers)
      with urlopen(req) as html:
         return BeautifulSoup(html.read(), 'html.parser')
   except Exception as err:
      logger.error(err)

def search_image():
   """ search the specified image on google and return it """
   soup = get_soup()
   imgs = soup.find_all('div', {'class': 'rg_meta'})
   img_src = []
   for i in imgs:
      link, ext = eval(i.text)["ou"], eval(i.text)["ity"]
      resolution = str(eval(i.text)["ow"]) + "x" + str(eval(i.text)["oh"])
      if eval(i.text)["ow"] >= 800 and eval(i.text)["oh"] >= 600:
         # append if the image resolution is greater then 800x600
         img_src.append((link, ext, resolution))

   cache.dump_cache(img_src)
   return img_src

def set_background(image):
   """ set background using feh """
   link, img_format , resolution = image
   # the temporarily images are saved in /tmp/
   image_path = '/tmp/img_{}.{}'.format(datetime.now().strftime("%H%M_%y%m%d"), img_format)
   try:
      req = Request(link, headers=headers)
      with urlopen(req, timeout=15) as image:
         with open(image_path, 'wb') as f:
            f.write(image.read())
   except Exception as err:
      logger.error(err)
      return None

   try:
      out = sp.run(['feh', '--bg-scale', image_path], stdout=sp.DEVNULL, stderr=sp.DEVNULL, check=True)
   except sp.CalledProcessError as err:
      logger.error(err)
      return None

   delay = args.d
   time.sleep(delay)
   if os.path.exists(image_path):
      os.remove(image_path)
   return image_path

class Main():

   def __init__(self):
      search_cache = cache.load_cache()
      if search_cache != None:

         if search in search_cache:
            print('searching in the cache... ' + search.replace('+',' '))
            self.images = search_cache[search]
         else:
            print('searching on google... ' + search.replace('+',' '))
            self.images = search_image()
      else:
         print('searching on google... ' + search.replace('+',' '))
         self.images = search_image()
      logger.info('cache length: {}'.format(len(self.images)))   

   def run(self):
      try: 
         i = last_line = 0
         while True:
            image = self.images[i]
            current_image = set_background(image)
            if current_image == None:
               updated_cache = cache.update_cache(image)
               self.images.remove(image)
               logger.info('{} removed'.format(image))
               logger.info('cache length: {}'.format(len(self.images)))
            i += 1
            if i >= len(self.images) - 1:
               i = 0
            if args.verbosity:
               # verbosity enable
               f = open(log_path, 'r')   # read the log file
               f.seek(last_line)      # return to the last line
               if f.readline():      # if line is not empty. This will change the current position on log file
                  f.seek(last_line)   # return to the last line 
                  print(f.readline().replace('\n', ''))  # readline
                  last_line = f.tell()               # save where stoped
                  
      except KeyboardInterrupt:
         if os.path.exists(current_image):
            os.remove(current_image)
      except Exception as err:
         logger.error(err)

def check():
   assert (sys.platform in 'linux'), "This code runs on Linux only."
   try:
      sp.run(['which', 'feh'], check=True, stdout=sp.DEVNULL)
   except:
      sys.exit('feh isn\'t installed')
   if args.d < 0:
      raise ValueError('sleep length must be non-negative')

if __name__ == '__main__':
   check()
   cache = Cache()
   if args.search:
      Main().run()

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