ubuntu 16.04LTS 开机启动自动更换壁纸的实现方法

  # -*- coding: utf-8 -*-  #!/usr/bin/python  #!/bin/bash    # ---------------------------------------------------------- #  # This is a script which can change background automatically #  # every time the system starts.        #  # author: Huang Zhenyang          #  # email: 745125931@qq.com         #  # ---------------------------------------------------------- #  # ----- Import ----- #  import os  import re  import urllib  import time  import socket  # --- End Import --- #    class Spider(object):   """   This is the spider to get the img from being   """   def __init__( self, img_matched_pattern_para, url_para, file_name_para ):    """    init function    :param img_matched_pattern_para: the pattern to match a img    :param url_para: url to crawler    :param file_name_para: file name    """    self.img_matched_pattern = img_matched_pattern_para    self.url = url_para    self.file_name = file_name_para   def get_img(self):    """    download the image    :return:    """    html = self.get_html()    img_pos = re.search(self.img_matched_pattern, html)    img_page_href = self.url + img_pos.group()[6:-7] + "download"    urllib.urlretrieve(img_page_href, self.file_name)     def get_html(self):    """    return the html    :return: page's html <type 'str'>    """    page = urllib.urlopen(self.url)    html = page.read()    return html    class Controller(object):   """   This is the controller to control the spider's parameters.   """   def __init__(self, pattern_href_para, path_para, url_para, img_max_num_para):    """    :param pattern_href_para: href's match pattern    :param path_para: path to save images    :param url_para: url    :param img_max_num_para: max number that the    """    self.pattern_href = pattern_href_para    self.path = path_para    self.url = url_para    self.img_max_num = img_max_num_para    self.file_name = ""    self.init_file_name = "0.jpg"    self.file_extension_name = ".jpg"   def judge(self):    """    judge if the number of images is grater than img_max_num.    if true, delete all of them and then run spider, else directly run spider.    Also, we should set the file name.    :return:    """    root = None    _dirs = None    files = None    for root, _dirs, files in os.walk(self.path, True):     pass    files_len = len(files)    if files_len == 10:     for i in range(0, 10):      os.remove(root + files[i])     self.file_name = self.path + self.init_file_name    else:     self.file_name = self.path + str(files_len) + self.file_extension_name   def run_spider(self):    """    run spider.    TODO: This function needs to be modified in the future which makes these two class coupling too much.    :return:    """    # In case user's computer hasn't connect the internet.    for i in range(0, 60):     try:      spider = Spider(self.pattern_href, self.url, self.file_name)      spider.get_img()      break     except IOError as e:      print "Connection error: %s" % e      time.sleep(60)      continue     except Exception as e:      print "Connection error: %s" % e      time.sleep(60)      continue    c_path = '"file://' + self.file_name + '"' # absolute path    # call system command to change the gnome background    os.system('gsettings set org.gnome.desktop.background picture-uri ' + c_path)    print "gsettings set org.gnome.desktop.background picture-uri " + c_path    if __name__ == '__main__':   pattern_href = r'href="/photo/.*?" rel="external nofollow" '   path = '/home/hzy/图片/backgrounds/'   url = 'https://bing.ioliu.cn/'   img_max_num = 10   controller = Controller(pattern_href, path, url, img_max_num)   controller.judge()   controller.run_spider()

  [Desktop Entry]  Name=autoChangeBackgroundImg  Comment=Python Program  Exec=python /home/hzy/Script/autoChangeBackgroundImg/autoChangeBackgroundImg.py  Icon=/home/hzy/Script/autoChangeBackgroundImg/autoChangeBackgroundImg.png  Terminal=false  MultipleArgs=false  Type=Application  Categories=Application;Development;  StartupNotify=true